Vocab
bone-building cell
osteoblast
bone tissue containing osteons
compact bone
which hormone increases blood calcium levels
PTH
bone-resorbing/breaking cell
osteoclast
bone tissue containing trabeculae
spongy bone
what two components of the bone matrix make bone both strong and slightly flexible
collagen and minerals
mature bone cell that maintains bone tissue
osteocyte
why does spongy bone have a lot of open spaces
reduce weight and allows space for marrow
what's the active form of vitamin D called
calcitriol
lattice-like structures in spongy bone
trabeculae
what does bone matrix contain
proteins and minerals
what could happen if your blood calcium levels are too low
muscle/nervous system dysfunction
structural unit of compact bone
osteon
why is compact bone organized into osteons
to organize/center around blood vessels and increase physical strength
which process forms most long bones
endochondral ossification