Bones by yurtgc548

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									Skeletal System
Bones
  The skeleton has two major
     parts:
  1. Axial skeleton are the
     bones of the head and
     trunk
  2. Appendicular
     skeleton are the
     bones of the pelvis
     shoulder girdle and
     limbs.
Bones
  Functions of the skeleton
  1. Aid in movement of the body
  2. Support and protect internal
     body organs
  3. Produce red and white blood
     cells
  4. Store minerals for the bodies
     usage.
Bones
  Ossification-process of bone
     formation.
  Ossification begins in week 8 of an
     embryos development.
  A baby is born with 270 bones
     and an adult has 206 bones
  A babies bones are soft and
     ossification continues and
     makes them hard and able to
     bear weight.
Bones
 Diaphysis-long bone
  containing a shaft.
 Epiphysis-end of long bone
 Medullary canal-center of
  the shaft where bone
  marrow is
 Spongy bone-breakdown of
  hard bone
 Periosteum-fibrous tissue
  covering the bone
Bones
  Bone growth
    starts from
    the center of
    the diaphysis
    and moves to
    the
    epiphyseal
    ends (end of
    the bones)
Bones
 Osteoblasts-bone
  cells involved in
  the formation of
  new bone.
 Osteoclasts-bone
  cells involved in
  the breakdown of
  old bone.
Bones
  When the epiephyseal cartilage is
     completely ossified growth
     stops.
  This is approximately 18 in
     females and 20-21 in males.
  Does this mean bone growth
     stops? Why or why not?
Bones-Types
 Long Bones-arms
  and legs
 Flat Bones-skull,
  ribs, sternum
 Irregular bones-
  spinal cord
 Short bones-
  cubelike bones of
  the tarsals and
  carpals
Bones
 Simple/closed fracture-
  break in bone that does
  not pierce skin




Femur fracture
Bones
 Open/Compound
  Fracture- the fractured
  end penetrates the
  skin. Possible infection.




tibia/fibula fracture
Bones-Injuries
 Comminuted Fracture-
  break in bone where it
  is fractured in many
  pieces




Tibia/fibula fracture
Bones
 Greenstick fracture-an
  incomplete fracture in the
  shaft of a bone occuring in
  children. Think of a child’s
  bone as that of a young tree
  shoot, it bends and may
  break part way, but does not
  crack like an adult’s would.
Bones
 Stress fracture-small
  incomplete break in
  the bone that results
  from overuse,
  weakness or
  biomechanical
  problems.
Bones
 Epiphyseal Plate
  Fracture-break in the
  bone at the growth
  plate. Typically in
  children 10-16, most
  often at wrist or
  ankle.
An avulsion fracture
Library Kinesiology Project
 Look at page 16 in text
   You are going to choose 10 of the words
    on the list to give the following
    information for.
       Marking
       Describe in your words
       Example
       Picture
       Be able to point it out on the skeleton in
        class

								
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