chapterr 6 Flashcards
1.calcium homeostasis
2. hematopoesis (blood forming)
functions of bone in general (both compact and spongy)
functions of bone in general
1.fat storage (yellow bone marrow)
2. bone makes hormone
must be eaten and is relatively rare in food
calcium
food with calcium
dairy, almonds, dark leafy greens
osteoGENIC cells (divide to form)
bone origin (mitotically active)
osteoBLASTS (bone builders)
form/repair & bone matrix by process called calcification
osteoCYTES (bone cells)
“mature” bone cells that are “trapped” within the matrix
osteoCLASTS (bone destroyers)
actually WBC’s that completely change FXN (no immunity) destroy bone by process called RESORPTION
what is compact bone composed of
osteons
structural features of compact bone
structure, support, muscle attachment, movement
what is spongy bone composed of
trabeculae
structural component spongy bone
1.holds/protects/contains bone marrow
2. hematopoiesis
monitor parathyroid PTH. destroy bone faster than building bone, may result in osteoporosis
to LITTLE calcium
makes calcitonine, monitor thyroid. bone build faster than they destroy (children) adults excrete excess calcium in urine
to MUCH calcium
resorption
process of destroying bone.
done by: osteoclasts
calcifications
process of building bone.
done by: osteoblasts
if the stimulas is UP
calcium hormone is up, and osteo clasts will slow down
if the stimulas is DOWN
pth is up
kidney
signal to retain calcium
intestine
signal intestine to absorb more calcium
peristeal arteries
supply to periostream
metaphyseal arteries
supply to metaphysis
epiphyseal arteries
supply to epuphysis
nutrient arteries
supply to diaphysis
tendons
connect muscle to bone
ligaments
connect bone to bone
