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A&P bone tissue

STUDY
PLAY
mineralized salts and collagen
two components in bone are responsible for the hardness and pliability
volkmann's canals
carry blood vessels through the center of compact bone lamellae
osteocytes
responsible for maintaining daily bone metabolim
endochondral ossification
carilaginous model is gradually replaced by bone tissue
spongey bone is located
in the epiphysis
trabeulae
not part of an osteon
diaphysis
shaft
epiphyses
rounded ends
metaphysis
epiphyseal plate (connects diaphysis to epiphyses)
medullary cavity
middle cavity filled with marrow
cortex
outer compact bone
periosteum
dense connective tissue outer lining of bone
endosteum
dense connective tissue inner lining of bone and medullary cavity of long bones
articular cartilage
hyaline cartilage covering epiphyses
compact bone
composed of osteons near the surface of the bone
canaliculi
tiny canals in the matrix through which osteocytes connect to each other
lacunae
space between lamellae containing osteocytes.
lamellae
rings of hard, calcified matrix around canals
osteons
(haversian systems) microscopic functional anatomic units of compact bone
osteogenic
produces osteoblasts. unspecialized stem cells found in the periosteum, endosteum and bone canals that are capable of cell division
osteoblasts
bone building cells. synthesize and secrete collagen/organic components to build new bone matrix; initiate calcification
osteocytes
mature bone cells. maintain daily cellular activities of bone such as nutrient and waste exchange with the blood. found in lacunae.
osteoclasts
function in bone resorption. destroy the matrix. found in the endosteum. help regulate blood calcium levels
tensile strength
resistance to being stretched or torn apart; provided by collagen fibers/organic molecules
bone
Ca2 reservoir
kidneys
filter and reabsorb Ca2
GI tract
few absorption of Ca2
Vitamin D
absorprtion of Ca2 at GI tract
parathyroid and calcitonin
Ca2 regulators