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							  SCHOOL OF DENTAL MEDICINE
    UNIVERSITY OF ZAGREB




 Lidija Štefić

ENGLISH IN DENTAL MEDICINE I
WORD FORMATION IN ENGLISH
               DERIVATION


          CONVERSION


COMPOUNDING
                            BORROWING
           DERIVATION

            AFFIXATION

             AFFIXES


SUFFIXES                 COMBINING
             PREFIXES      WORD


           ROOT (STEM)
   BASIC WORD STRUCTURE
              Word root:     gingiv/al
                            root (gums)
               Suffix:      gingiv/itis

                                suffix (inflammation)
               Prefix::       sub/gingiv/al

                               prefix (below)

Combining word::      electr/o/cardi/o/gram

                                          root   suffix
             prefix
                         combining vowel
SUFFIXES IN DENTAL MEDICINE
a word added at the end of a word or word base (root)
               to change its meaning.

                   DERIVE FROM

      Greek                          Latin
 WR    SUFFIX             NEW TERM USED IN
                        DENTISTRY OR MEDICINE
 gingiv +   -itis              gingivitis
 arthr +    -algia             arthralgia


WR     +O      SUFFIX     NEW TERM USED IN
                        DENTISTRY OR MEDICINE
pulp   +O     + -tomy         pulpotomy
       SURGICAL PROCEDURE SUFFIXES
                           Incision

-ectomy (surgical removal, excision)
         apiectomy -      the ablation of the root end of a tooth
-o/centesis (surgical puncture)
         amniocentesis surgical perforation of the uterus to
         -             obtain amniotic fluid
-o/stomy (forming an opening)
         esophagostom the surgical creation of an opening
         y-           into the esophagus
-o/tome (instrument to cut)
         osteotome -      a chisel like knife for cutting bone
-o/tomy (to cut into)
     tracheotomy -        incision of windpipe
 Plastic operations (repair, rebulid, reconstruct, bind)

-desis                  arthrodesis - surgical fixation of a joint


-o/rrhaphy (suture)     splenorrhaphy - surgical repair of the
                        spleen
-o/pexy (fixation,      splenopexy - surgical fixation of a
suspension)             mobile spleen
-o/plasty (formation,   osteoplasty - plastic surgery involving a
plastic                 bone
    repair)
           Refracturing, loosening, crushing


-o/clasis (to break down,     osetoclasis - the surgical
refracture)                   fracture or refracture of
                              bones
-o/lysis (loosen, free form   enterolysis - the
adhesions,                    operative division of
    destruction)              adhesions between loops
                              of intenstine of or
                              between the intestine
                              and
                              abdominal wall
-o/tripsy (to crush)          neurotripsy - surgical
                              crushing of a nerve
      DIAGNOSTIC AND SYMPTOMATIC SUFFIXES

-algia (pain)
          odontalgia -       toothache
-o/cele (hernia, swelling)
          nephrocele -       hernial protrusion of a kidney
-o/dynia (pain)
          odontodynia -      toothache
-ectasis (dilatation, expansion)
          bronchiectasis     chronic dilatation of the bronchi
          -
-emia (blood condition)
          hyperemia -        an excess of blood in a body part
-o/gen (beginning, origin) pathogen -any disease - producing
                           microorganism
-o/gram (a writing, record)
           roentgenogram - a photograph taken with the x-rays
-o/graph (to write, record)
           cardiograph -      a technique by means of which
                              roentgenograms of the heart can be made
                              at any chosen phase of its cycle.
-iasis (condition, formation of, presence of)
           psoriasis -        a chronic skin disease characterized by
                              scaly red dish patches
-sis (state of, condition)
           dysgenesis -       state of deterioration of hereditary
                              qualites of the stock
-itis (inflammation)
           stomatitis -     a general inflammation of the mouth
-o/logy (study of)
           odontology -     the study of the teeth
-o/malacia (softening)
           osteomalacia -   a condition marked by softening of the
                            bones
-o/megaly (enlargement)
           acromegaly -     enlargement of the extremities of the
                            skeleton, the nose, jaws fingers and toes
-o/meter (measure)
           dynamometer -    an instrument for measuring forces or
                            power
-oma (tumor, mass)
          odontoma -          tumor of a tooth, although it doesn’t show
                              all the features of a tumor. It consists of the
                              calicified dental tissues
-opsy (process of viewing)
     autopsy -                an examination and dissection of a dead
                              body to discover the cause of death,
                              damage done by disease.

-o/pathy (disease)
          trombocytopathy - a very rare disease of unknown etiology
                            where there is a tendency to bleeding.
-o/penia (decrease, deficiency)
             leukocytopenia       deficiency in the number of leukocytes
             -
-osis (abnormal condition, increase-used only with blood cells) e.g.
leukocytosis
           sialosis -         chronic swelling of the salivary glands
-phagia (eating)
           dysphagia -        difficulty in swallowing
-phasia (speech)
           dysphasia -        impairment of the ability to speak
-plegia (paralysis, stroke)
           paraplegia -       paralysis of the legs and lower part of the
                              body
-phobia (morbid fear)
            aerophobia -         an abnormal fear of air, especially drafts
-o/ptosis
            metroptosis -        downward displacement or prolapse of the
                                 uterus
-o/rrhage (burst forth)
            hemorrhage -         excessive blood flow
-o/rrhea (discharge, flow)
            dysmenorrhea -       painful or difficult menstruation
-o/clerosis (hardening)
            arteriosclerosis -   thickening and loss of elasticity of arterial
                                 walls
-scope (instrument to visually examine)
      endoscope -                an instrument for examining visually the
                                 inside of a hollow organ of the body, as the
                                 bladder or rectum
               SUFFIXES: ADJECTIVE ENDINGS

            The adjective endings that mean “pertaining to” are:




-ac                   cardiac (heart)
-al                   gingival (gums)
-ar, -ary             salivary (saliva)
-ic                   dermic (skin)
-ical                 apical (apex)
-ous                  mucous (mucosa)
-(t)ic                lymphatic (lymph)
                 SUFFIXES: NOUN ENDINGS

-coccus   bacteria              streptococcus (berry shaped bacteria)
-cyte     cell                  thrombocyte
-ole      little, small         arteriole - little artery
-trophy                         hypertrophy (cells increase in size, not
                                number)
-ule      little, small         nodule - little node
-ist      specialist            dentist - a specialist in dentistry
-iac      an individual         hypohondriac - an invidual who thinks
          affected by a         he is ill
          certain disase
-ia       abnormal condition amnesia - forgetfulness
-is       forms the noun        cutis - skin
          from the root
-ism      abnormal              alcoholism
          condition, state of
          being
PREFIXES IN DENTAL MEDICINE
     at the beginning of a word

            DERIVE FROM

  Greek                           Latin
   PREFIXES OF DIRECTION


 Prefix         Meaning            Example
                              ab/normal
  ab-      from,away from
                              usual, regular
                              ad/sternal
  ad-      to, toward, near
                              breast plate
                              circum/renal
circum –                      kidney
           around
  peri-                       peri/odontal
                              tooth
Prefix       Meaning             Example
                           ec/tropia
 ec-                       place
         through, across
 ex-                       ex/cision
                           to cut
                           ecto/derm
                           skin
ecto-
                           ex/odontics
 exo-    outside
                           tooth
extra-
                           extra/cellular
                           cell
Prefix        Meaning          Example
                         endo/cranial
endo-                    skull
         in, within
Intra-                   intra/dental
                         tooth
par-     near,           para/nasal
para-    beside,beyond   nose

                         super/acidity
super-   above           acidity
supra-   excessive       supra/molecular
                         molecule
Prefix        Meaning           Example
                           ultra/sonic
ultra-   beyond,excesive
                           sound
                           dia/rea
                           flow
 dia-
                           per/cutaneos
 per-    trough, across
                           skin
trans-
                           trans/urethral
                           urethra
    PREFIXES OF POSITION
Prefix          Meaning                Example
                                 ambi/lateral
 ambi-     both,both sides
                                 side
                                 amphi/cranial
amphi-     on both sides
                                 skull
                                 ante/febrile
                                 antero/septal
 ante-
                                 Septum
anter/o-
           before, in front of   pre/operative
  pre-
                                 Operation
 pro-
                                 pro/nephros
                                 kidney
Prefix            Meaning             Example
                                 dextr/o/rotatory
dextr/o-   right, to the right
                                 rotation
                                 dors/o/ventral
dors/o-    back
                                 belly
                                 epi/cranial
  epi-     upon
                                 skull

 hypo-     under below           hypo/dermic
                                 skin
                                 infra/sonic
 infra-                          sound
           beneath, under
  sub-                           sub/lingual
                                 tongue
 Prefix            Meaning              Example
                                   inter/dental
  inter-     between
                                   tooth
                                   latero/abdominal
 later/o-    to the side of
                                   stomach
 mes/o-                            mes/o/dermic
             in the middle of
 medi-                             skin
 retro-                            retro/cervical
             after,backward
 post-                             cervix(neck)
postero-     located, behind       postero/lateral
                                   To the side of
                                   sinistr/o/dextral
sinistr/o-   left,to the left of
                                   to the right
PREFIXES OF NUMBER AND MEASUREMENT


    Prefix           Meaning              Example
                                     micro/stomatous
    micro-   small
                                     mouth
    macro-   large                   macro/cyst
    hyper-   over,above,excessive    hyper/sensitivity
                                     hypo/glossal
    hypo-    under,below,deficient
                                     tongue
                                     primi/para
    primi-   first
                                     to bear off spring
Prefix             Meaning       Example
                             uni/lateral
 uni-                        side
         one
mono-                        mono/nucleus
                             kernel
                             bi/lateral
 bi-                         side
         two
 di-                         di/phy/odont
                             leaf, tooth
                             hemi/plegia
hemi-    half
                             paralysis
                             semi/lunar
semi-    partial
                             moon
Prefix            Meaning       Example
                            multi/lateral
multi-                      side
          many
poly-                       poly/phobia
                            fear
                            tri/cephalus
  tri-    three
                            head
                            quadry/plegia
quadri-   four
                            paralysis
       PREFIXES OF COLOUR

 Prefix             Meaning        Example
    alb-                      albin/ous
albumino-                     contain
            white
  leuc/o-                     leuc/emia
  leuk/o-                     blood condition
 chlor/o-   green             chlor/emija
                              glauc/oma
glauc/o-
            grey              swelling
 poli/o-
                              polio/myel/itis
 Prefix             Meaning            Example
                              cirrh/osis
cirrh/o-
            yellow            abnormal condition
xanth/o-
                              xanth/emia
                              cyan/o/dermia
cyan/o-     blue
                              skin
melan/o-    black             melan/oma
                              tumor, mass
                              erythr/o/cyte
erythr/o-
            red               cell
 rube/o-
                              rube/osis
                              abnormal condition
                              purpur/ic
purpur/o-   purple
                              pertaining to
            PREFIXES OF NEGATION
   Prefix              Meaning                      Example
     a–                                    a/pnea
(used before a
  consonant)                               breath
                 without, not, a lack of
     an-
(used before a
    vowel)
                                           ar/rhythmia
     ar-                                   rhythm
     im-                                   im/mature
                 not
     in-                                   in/somni/ac
     dis-                                  sleep
                                           dis/functional
   MISCELLANEOUS PREFIXES

Prefix            Meaning                 Example
                                  anti/bacterial
 anti-                            Bacteria
          against
contra-                           contra/ception
                                  fertilization
                                  brady/cardia
brady-    slow
                                  heart
                                  tachy/cardia
tachy-    rapid
                                  heart
                                  Dys/phagia
 dys-     Bad,paniful,difficult
                                  swallowing
Prefix             Meaning             Example
                               eu/pnea
  eu-      good, easy
                               breathing
                               heter/o/cellular
heter/o-   different
                               cell
                               homo/sexual
homo-      same
                               sex
                               hydr/o/cephalus
hydro-     water
                               head

 mal-      ill, bad, poor      mal/nutrition
                               food substances
                               meta/plasia
 meta-     after,over,change
                               abnormal (change)
Prefix             Meaning            Example
                             pan/hyster/ectomy
 pan-      all
                             uterus/removal
                             pseudo/mening/itis
pseudo-    false
                             meninges inflammation
                             scler/osis
scler/o-   hard
                             condition of
                             sym/podia
 sym-                        foot
           union, together
 syn-                        syn/chilia
                             lips
                  COMBINING FORMS


Combining   Meaning    Terminology                 Meaning
form
cyt/o       all        cytology

cephal/o    head       cephalic
                       -ic means pertaining to
physi/o     nature     physiology
                       study of functions of the
                       living organism
hem/o       blood      hematoma
                       -oma means tumor or mass
crin/o     to secrete   endocrine glands
                        endo-means within
derm/o     skin         hypodermic
                        hypo-means below, under
gingiv/o   gums         gingivitis
                        -itis means inflammation
cerebr/o   brain        cerebral
           cerebrum     -al means pertaining to
gen/o      producing   pathogenic
           produced by patho-means disease
gnos/o    knowledge   diagnosis
                      -dia-means complete;
                      -sis means state of. A diagnosis
                      is    made     after    sufficient
                      information has been obtained
                      about the patient’s condition
cardi/o   heart       cardiology

sarco/o   flesh       sarcoma

path/o    disease     pathological

orth/o    straight,   orthodontist
          regular,    odont means tooth
          correct     -ist means a specialist
bi/o      life        biopsy
                      -opsy means process of viewing
oste/o    bone        osteodynia
                      -dynia means pain
                  ANATOMY
Anatomy (from the Greek ἀνατομία anatomia, from ἀνατέμνειν ana:
     separate, apart from, and temnein, to cut up, cut open)
                      is a branch of biology

         It is the study of exernal and internal structures
                   and the physical realationships
                         between body parts



                                               Microscopic
Macroscopic (gross)
                                               -cytology
-surface
                                               -histology
-regional
systemic
           HYSTORY OF ANATOMY


Hippocrates of Kos
(Greek: Ἱπποκράτης)
                          Claudius Aelius Galenus




                                (AD 129 – 200)
ca. 460 BC - ca. 370 BC
               Canon of Medicine
Ibn al-Nafis




  1213-1288



                        1484
Leonardo da Vinci   Anatomy Lesson of dr.Nicolaes Tulp
                                 1632




                               Rembrandt
                               1606 - 1669
   1452 - 1519
Anton Van Leeuwenhoek




      1632 - 1723
Robert Hooke’s microscope

                            The scanning electron microscope (SEM)
   Anatomy employs two chief methods of study - the systemic and
topographic.In the former the body is regarded as consisting of systems
                              and organs.

  The divisions of systemic anatomy are:


         a. Osteology, the description of the skeleton
         b. Arthrology, the description of the joints
         c. Myology, the description of muscles and accessory
            structures
         d. Splancnology, the description of viscera
         e. Angiology, the description of organs of circulation
         f.   Neurology, the description of the nervous system
         g. Esthesiology, the description of the sense organs
Dental medicine takes into consideration other branches of systemic
anatomy such as : embriology, genetics, endocrinology and dermatology.




      Pathological anatomy is the study of diseased organs.
 sections of normal anatomy applied to various purposes receive
                       special names such as
 medical, surgical, ginaecological, artistic and superficial anatomy
Structural Organisation of the Body


         Organs, Systems
          Body Cavities
          Organs and Systems

Tissues  Patterns  Various Organs
Organs = several kinds of tissue
viscera (lat.) = internal organs (sing. viscus)
Systems = groups of organs working
together and performing complex functions
            Gastrointestinal System


•Mouth, pharynx,
• oesophagus, stomach,
• intestines
 (small and large),
•liver, gallbladder, pancreas
          Excretory System



Kidneys, ureters,
urinary bladder,
urethra
            Respiratory System

Nose, pharynx, larynx,
trachea, bronchial
tubes, lungs
          Reproductive System
Female: Ovaries,
fallopian tubes,
uterus, vagina,
mammary glands
         Reproductive System
Male: testes
and associated tubes,
urethra, penis,
prostate gland
                Endocrine System

Thyroid gland,
pituitary gland, sex glands,
adrenal glands,
pancreas,
parathyroid glands,
pineal gland, thymus gland
             Nervous System

Brain, spinal cord,
nerves, and collection
of nerves
      Cardiovascular System

Heart, blood vessels
(arteries, veins and
capillaries),
lymphatic vessels
and nodes,
spleen, thymus gland
      Muscular System

Muscles
          Skeletal System



Bones and joints
(articulations)
       Integumentary System
Skin, hair, nails and
associated glands
(sweat or sudoriferous
and sebaceous
or oil glands)
               Body Cavities



Body cavity = space
within the body
containing the
internal organs (viscera).
        Cranial Cavity




Brain
              Thoracic Cavity
Subdivided into:
  -Pleural Cavities:
  area surrounding the
  lungs
  -The Mediastinum:
  area between the
  lungs; contains heart,
  aorta, trachea,
  oesophagus, and
  thymus gland
               Abdominal Cavity


Stomach, small and large
intestines, spleen, liver,
gallbladder, pancreas,
kidneys
Surrounded by
peritoneum
             Pelvic Cavity




Urinary bladder,
urethra, ureters;
uterus and vagina
in the female
Spinal Cavity



Spinal cord and
nerves of the spinal
cord
             Glossary

tissue = tkivo
cavity = šupljina
gallbladder = žučni mjehur
pancreas = gušterača
spleen = slezena
thymus gland = prsna žlijezda
thyroid gland = štitnjača
MUSCULOSKELETAL SYSTEM

      •BONES
      •JOINTS
      •MUSCLES
BONES
Bones are complete organs, composed
of connective tissue called osseous tissue


 Dense connective tissue includes the
 cartilage and bone



 It consists of osteocytes surrounded by
 intercellular substance filled with
 calcium salts
It is composed of an outer hard layer
and an inner,spongy core.


Compact tissue- forms the outer layer of
bones, it is arranged in concentric
layers with a hollow centre which carries
blood vessels and nerves.
The inner spongy core- forms the inside of
bones, it has the yellow and red bone marrow.


 - the yellow bone marrow stores fat cells
(leucocytes).


 - the red bone marrow contains red cells
(erythrocytes).
External surface of bone is covered by
periosteum- it has the function
of feeding the bone
Several hormones regulate the activity of the bone
                     cell



1) Osteoblasts- they are immature
  osteocytes which produce the bony tissue
  that replaces cartilage during ossification
 2) Osteoclasts- they reabsorb bony
tissue thus enlarging the inner bone
cavity so that the bone does not
become overly thick and heavy
 - parathyroid gland stimulates
osteoclasts to remove bone and to
stimulate osteoblasts to build up the
bone
      It secretes a hormone to release
calcium from bone, bones become weakened
           due to loss of calcium.
             CRANIAL BONES



•Frontal
•Parietal
•Temporal
•Occipital
•Sphenoid
•Ethmoid
              FACIAL BONES

•Nasal
•Lacrimal
•Maxillary
•Mandibular
•Zygomatic
•Vomer
The Mandible
The Maxilla
The Palate
                     JOINTS
junctions (meeting places called articulations)
between two or more bones.


 SYNARTHROSES
  DIARTHROSES
TEMPOROMANDIBULAR JOINT (TMJ)
FOUR MOVEMENTS OF TMJ:

         Elevation


Depression
                     Protraction




  Retraction
                   MUSCLES
       from Latin musculus, diminutive of mus "mouse"


Myology is the branch of anatomy dealing with the muscles,
muscular tissue components, structure and functions.


                 Striated - Voluntary

                  Smooth - Involuntary

                        Cardiac
                  MASTICATORY MUSCLES
Temporal Muscle

Masseter Muscle

Lateral (External)
Pterygoid Muscle

Digastric Muscle
(Anterior Portion)
Temporal Muscle
Masseter Muscle
Lateral (External) Pterygoid Muscle
Digastric Muscle (Anterior Portion)
             FACIAL MUSCLES
Orbicularis oris
– the sphincter of the mouth

                           The buccinator
                           - a deep muscle of the cheek
THE NERVOUS SYSTEM
                        NERVE TISSUE

                                                      Neuroglia
Neurons


                           Neuron

             Dendrite                               Axon Terminal
                                  Node of
                                  Ranvier
                           Soma




                                                  Schwann cell
                          Axon
          Nucleus                 Myelin sheath
                         SYNAPSE
     Greek "syn-" ("together") and "haptein" ("to clasp").
        synapses are specialized junctions through which neurons
signal to each other and to non-neuronal cells such as those in muscles or
                                 glands.
THE BRAIN
CRANIAL NERVES

       There are 12 pairs of cranial nerves.
        Olfactory I
        Optic II
        Oculomotor III
        Trochlear IV
        Trigeminal V
        Abducens VI
        Facial VII
        Auditory (vestibulocochlear) VIII
        Glossopharyngeal IX
        Vagus X
        Spinal Accessory XI
        Hypoglossal XII
THE CIRCULATORY AND
 LYMPHATIC SYSTEM
   BLOOD AND OTHER BODY FLUIDS


Fluids constitute over
half of an adult’s weight
under normal conditions

These fluids are vital
in the transport of
nutrients to all cells
Blood is composed of:
         liquid (plasma) – 55%
         formed elements ( erythrocytes,
         leukocytes and platelets) – 45 %
Plasma consists of
about:

- 90% of water
7% proteins
less than 1%
inorganic salts,
organic substances,
dissolved gases,
 hormones, antibodies
and enzymes
Many important proteins
such as serum, albumin,
gamma globulin and
fibrinogen are dissolved
in the plasma
Fibrinogen is essential in the clotting process
All blood cells originate from hemocytoblasts

They change from undifferentiated form into
        specialized or differentiated

Hematopoiesis: :
Blood transports oxygen from the lungs to
   the body tissues, and carbon dioxide
       from the tissues to the lungs:
                   Erythrocytes


The great majority of
all blood cells
35 trillion in the
average adult
Total surface area almost
the size of a football field
Hemoglobin enables carrying oxygen from the
lungs to the tissues
Red blood cells are
stored in the spleen

They live for about
110 to 120 days

About 180 million
erythrocytes are
destroyed every
minute
                  Leukocytes

Body’s primary
defense against
Infections

These cells are larger
than erythrocytes and
fewer in number

Blood has about 8000
leukocytes per cubic
millimeter
Classification of leukocytes
1. Granulocytes ( neutrophils, eosinophils, basophils)
2. Agranulocytes (monocytes, lynphocytes)
Neutrophils form
about 70%, and
limphocytes about
20% of the total
number
       Platelets (thrombocytes)

        Small clear disk-shaped bodies

       About 1/3 the size of erythrocytes

25000 platelets per one cubic millimeter of blood

           They initiate blood clotting
Platelets disintegrate
and adhere to the
edges of the injured
tissue
       Blood coagulation (clotting)

The process by which the body
prevents blood loss

Bleeding generally stops within
5 minutes

A thrombus can form
within a vessel
          Defects in blood vessels
         (owing to injury or disease)

•Anemia
•Neutropenia
•Human immunodeficiency
 virus (HIV)
•Leukimia
•Thrombocytopenia
•Hemophilia
BLOOD TRANSFUSION
  BLOOD GROUPS
  Four main blood groups




Type O = universal donors
Type AB = universal recipients
       Rhesus factor - Rh


Another important factor, called Rh factor must
also be considered in blood typing. This is a
very complex system : 8 principal variants of
the Rh factor are known, and there are others
not yet identified and grouped. For practical
reasons there are 2 main groups of Rh types:
Rh positive
Rh negative
   Blood diseases

Blood parasites
Christmas disease
Hemophilia
Malaria
Septicemia
Vitamin K deficiency
Hemoglobin C,S,E disease
Vitamin K deficiency
Anemia
Malaria
Hemophilia
THE CIRCULATORY AND
 LYMPHATIC SYSTEM
 CARDIOVASCULAR SYSTEM

The cardiovascular system is composed of the
heart, blood vessels and blood. The circulatory
system consists of the heart, blood vessels and
lymphatics. This system transports food,
oxygen, and other vital substances to all body
cells and picks up waste products for disposal.
           THE HEART

The heart is a hollow, muscular organ that
pumps blood through the blood vessels. It is
enclosed in a fibrouserous sac called
pericardium. The heart beats over 100.000
times per day. It weights about one half pound
and is the size of clenched fist
 The heart has three distinctive layers of
   tissue:

 The endocardium
 The myocardium
 The epicardium



The heart is divided into four
  chambers:

Right atrium
Right ventricle
Left atrium
Left ventricle
                BLOOD VESSELS
                      ARTERIES
carry blood from the heart to the body tissues and organs


                          VEINS
   carry blood back to the heart from body organs and tissues


                     CAPILLARIES
                 connect arterioles to venules.
LYMPHATIC SYSTEM


Lymph fluid
Capillaries
Lymphatic vessels
Lymphatic ducts
Lymph nodes
                  FUNCTION
 Transporting fluids from tissues back to the bloodstream
Aiding in the control of infection caused by microorganisms

Conveyance of lipids or fats away from the digestive organs
Lymph nodes of the human head and neck




             Regional lymph tissue
          THE DIGESTIVE SYSTEM

The digestive system is
basically a long, muscular
tube that begins at the
mouth and ends at the anus
The functions of the
digestive system are
threefold
Digestive enzymes are substances that speed up
chemical reactions and help in the breakdown of
complex nutrients

Digestion can be defined as a complete process of
changing the chemical and physical composition of food
in order to facilitate assimilations of the nourishing
ingredients of flood by the cells of the body
The gastrointestinial (GI) tract begins at the oral cavity or
                           mouth
                   THE MOUTH
The mouth is the first division of the digestive tube
and is separable into two parts, smaller external
part, the vestibule formed by the lips cheek, gums
and teeth and a larger part, the mouth proper (oral)
cavity behind the gums and teeth
                Lips and cheeks

Lips are a visible body part at the mouth of humans
and many animals.
Lips are soft, movable, and serve as the opening for food
intake , and in the articulation of speech,
as a tactile sensory organ as an erogenous organ used
in kissing and other acts of intimacy.
Cheeks (Latin: buccae) constitute the area of the
face below the eyes and between the nose
and the left or right ear.
Gums and teeth
    Gingiva are part of the soft tissue lining of the mouth.

 They surround the teeth and provide a seal around them.

Compared with the soft tissue linings of the lips and cheeks,
most of the gingiva are tightly bound to the underlying bone
and are designed to resist the friction of food passing
over them. Healthy gingiva is usually coral pink,
but may contain physiologic pigmentation.
Changes in color, particularly increased redness,
together with edema and an increased tendency to bleed,
suggest an inflammation (gingivitis)
Teeth (singular, Tooth) are small whitish structures
found in the jaws (or mouths) of many vertebrates
that are used to tear, scrape, milk and chew food


 Humans usually have 20 primary teeth
 (also called deciduous, baby, or milk teeth)
  and 32 permanent teeth. Among primary teeth,
  10 are found in the (upper) maxilla and the other
 10 in the (lower) mandible.
 Teeth are classified as incisors, canines,premolars
  and molars .
  The main functions of the teeth:




Incisors = cutting
Canines = tearing
Premolars = crushing
Molars = grinding
               The tongue
The tongue is skeletal muscle on the floor of the
mouth that manipulates food for
chewing and swallowing (deglutition).
The main functions of the tongue:

  •It moves food around in the mouth
  •It begins swallowing action (deglutition)
  •It aids in speech production
  •It provides the equipment for taste sensation

						
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