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