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24 Cards in this Set

  • Front
  • Back
What does the skeleton support?
soft tissues of the body
How does the skeleton help with movement
bones serve as levers and joints as fulcra
What does the skeleton protect
vital organs
what minerals does the skeleton store
calcium and phosphorus
what does the skeleton function in producing
blood cells (hemopoiesis)
what are the 5 types of bones with examples
1. long-femur, tibia, metatarsals
2. short-carpals, tarsals
3. flat-ribs, skull, sternum
4. sesamoid-patella
where do sesamoid bones develop
in certain tendons such as the knee and foot
what are osteocytes?
mature bone cells
what are osteoclasts
cells that tear down bone
what are osteoblasts
cells that build new bone
what is another term for shaft of a long bone?
what is the epiphyseal line
where the epiphysis and the diaphysis fuse after the epiphyseal plate is no longer active
name the layers of bone from outside in
1. periosteum
2. compact bone
3. yellow marrow in the medullary cavity
what does spongy bone contain
red marrow for producing red blood cells
what is the structural unit of a bone
the osteon(haversian system)
What is the osteon composed of?
1.Haversian canal
2. lamellae
3. lacunae
4. osteocytes
5. canaliculi
what is the haversian canal?
the passage of blood vessels
what is the lamellae
concentric layers of bony tissue
whatis the lacunae
spaces containing osteocytes
what is the canaliculi
connections between lacunae
what is osteoporosis
a condition in which the bones are weak due to more resorption than deposition
what compression fractures are most common in osteoporosis
spine and neck of the femur
who is at the highest risk for osteoporosis
post menopausal women and anyone that is immobile
what two things are needed to keep bones strong
calcium and exercise