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THE INTEGUMENTARY SYSTEM.ppt

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THE INTEGUMENTARY SYSTEM.ppt Powered By Docstoc
					      THE
INTEGUMENTARY
    SYSTEM
   ASSOCIATED PRE/SUFFIXES
Adip(o),    Fat     Epi-       Over
lip(o)
Albin-      White   -fer-      Carry

Basale      Base    Kerat(o)   Bumpy

Corneum     Scaly   Lucidous   Clear

Cutane(o)   Skin    Melan-     Black

Derm(o),    Skin    Seb(o)     Fat, sebum
dermat(o)
Sub-        Under

Sudor-      Sweat

Accessory           Others

Hidr(o)     Sweat   Axill(o)   armpit

Onych(o),   Nail
ungu(o)
Pil(o),     Hair
trich(o)
                  The Skin

   Largest organ in the body

   In adults, covers 22 square feet

   Weighs 10 – 11 lbs (16% of body weight)
STRUCTURE
Layers of the Skin
            Epidermis – top layer

            Dermis – middle layer

            Subcutaneous fascia
             (hypodermis) – third
             layer (textbook says
             this is really not a
             layer of the skin)
                     Epidermis
   Stratified squamous epithelial tissue
       Stratum corneum – 25 – 30 layers of dead
        keratinocytes
       Stratum lucidum – 3 – 5 layers of clear
        keratinocytes (fingertips, palms, soles)
       Stratum granulosum – 3 – 5 layers of
        keratinocytes (apoptosis)
       Stratum spinosum – 8 – 10 layer of
        keratinocytes
       Stratum basale – single row of keratinocytes,
        melanocytes, Langerhans cells, Merkel cells
                   Dermis

   Connective tissue
   Blood vessels
   Nerves
   Glands
   Hair follicles
           Layers of the Dermis
   Papillary region –
    superficial 1/5,
    areolar c t, elastic
    fibers, blood vessels,
    touch sensors
   Reticular region –
    deeper, collagen and
    elastic fibers, adipose
    cells, hair follicles,
    nerves, sebaceous
    and sudoriferous
    glands
                  Skin Color
   Melanocytes
   Hemoglobin
   Carotene
   Albinism
   Vitiglio
   Cyanotic
   Jaundice
   Erythema
   Pallor
             Tats and Piercings
   Tattoos – pigments        Body Piercings –
    inserted into dermis       inserting jewelry into
    with needle                an artificial opening
Accessory Structures
   Hair
   Nails
   Skin glands
       Sebaceous glands
       Sudoriferous glands
            Eccrine glands
            Apocrine glands
       Ceruminous glands
   Anatomy                           Hair
       Shaft
       Root
       Follicle
            Epithelial root sheath
            Dermal root sheath
            Bulb
            Papilla
            Matrix
   Function
       Protection
       Sensing
      Hair conditions/treatments
   Depilatory          Alopecia
   Electrolysis        Hirsutism
   Laser removal       Androgenic alopecia
    treatments           (male-pattern
   Chemotherapy         baldness)
   Lanugo
   Vellus hairs
   Terminal hairs
 Skin
glands
    Nails
   Nail body
        Lunula
        Hyponychium
        Eponychium (cuticle)
   Free edge
   Nail root
        Nail matrix
   Protects the end of
    the digit
      FUNCTIONS OF THE SKIN
   Temperature
   Protection
   Sensation
   Excretion
   Absorption
   Vitamin D synthesis
        Temperature Regulation
   Thermoregulation –
    regulation of body
    temperature
     Releasing or
    restricting sweat
     Adjusting the flow of
      blood in the dermis
     Arrector Pili muscle
                         Protection
   Dehydration
       Keratin (protein) prevents
        water loss
       Sebum prevents drying out
        of hair and skin
   Microbial
       Keratin
       Sebum
       Sweat’s acid pH
       Epidermal Langerhans cells
   Abrasion
       Keratin
   UV rays
       Melanin
              Cutaneous Sensation
                            Meissner's corpuscle
                              light touch
   Tactile sensations      Pacinian corpuscles
       Touch                 deep pressure, vibration
       Pressure
        Vibration
                            Free Nerve Endings
    
                              pain, temp changes,
        Tickling
    
                             itchiness.
   Thermal sensations
       Warmth
       Coolness
   Pain
         Excretion and Absorption
   Sweat               Lipid-soluble
       Water            substances
       Heat                Fat-soluble vitamins
       Salts               Meds
       CO2                 O2
       Ammonia             CO2
       Urea                Transdermal patches
         Synthesis of Vitamin D
   Enzyme in the liver
    and kidneys modify
    the precursor
    molecule in the skin
    to produce Vit D
   Vitamin D is
    necessary for the
    absorption of Ca in
    the digestive tract
             Wound Healing
   Epidermal wound      Deep wound healing
    healing
        Aging of the Skin (D2)
Wrinkles; pinched skin    Collagen, elastic fibers,
springs back less         fibroblasts breakdown
                          and decrease
Decreasing skin’s         Macrophages less
immune response           efficient, Langerhans

Aged skin                 Loss of subcutaneous fat


Dry, easily broken skin   Decreased size of
                          sebaceous glands

Gray hair and atypical      in size of melanocytes
skin pigmentation
        Focus on Homeostasis

   Contribution of The Integumentary
    System to Homeostasis in other Body
    Systems – Table in text pg. 163
            Diseases/Disorders
   Skin cancer           Nevus
   Burns                 Wart
   Decubitous ulcer      Pruritis
   Acne                  MRSA
   Herpes                Albinism
   Hives
   Impetigo
                 Skin cancer
   Basil cell carcinoma
   Squamous cell
    carcinoma
   Malignant melanoma
                          Burns
   1st degree
       Epidermis damaged
   2nd degree
       Epidermis & dermis,
        blisters
   3rd degree
       All 3 layers
   4th degree
       Burned down to the
        bone
              Decubitous ulcer
   Bed sore or pressure
    ulcer
Impetigo
       It is generally caused by
        one of two bacteria:
        group A streptococcus or
        staphylococcus aureus
       Affects preschool and
        school-age children
       more likely to develop if
        the skin has already been
        irritated or injured by
        other skin problems
Pruritis
       Itching
                      MRSA
   Methicillin resistant
    staphlococcus aureus
                     Albinism
   Genetic disorder –
    individual fails to
    produce melanin
Vitiglio
       Genetic
Membrane    Tissue type Common          Functions
                        locations
Mucous      Epithelial/ Respiratory,  Protection
            Connective digestive,     lubrication
                        urinary,repro secretion
                                      absorp
Serous      Epithelial/ Inter ventral Lubricate
            Connective body cav,
                        organs
Cutaneous   Epithelial/ Skin          Protection
            Connective
Synovial    Connective Line joint       Lubricate
                       cavities
               Terms for # 2

   Parietal – lines the cavity

   Visceral – covers the organ

				
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posted:12/21/2012
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