Bone tissue cells
osteogenic cells (osteoprogenitors), osteoblast, osteocytes and osteoclast
Osteogenic cells (osteoprogenitors)
produce new cells; stem cells →osteoblast
create more bone mass and make bone (matrix)→osteocytes
mature bonecells →bone maintance
bone resorption (breakdown)→different origin than other bone cells; release calcium
calcium salt and collagen (protein)
compact (dense) and spongy (cancellous)
Two types of spongy bones
periosteum-surround "outside" of bone and endosteum-surround "inside" of bone
Compact (dense) bone basic unit (building block)
Compact (dense) bone central canal
blood vessels; respond to nerve
Spongy (cancellous) bone basic unit (building block)
Spongy (cancellous) bone central canal
Bone development & growth
intramembranous ossificaiton and endochondral ossification
messenchyme → bone (produce bone); occur relatively EARLY in development
cartilage→bone; occurs relatively LATE in development
What bone is used for
Endochondral ossification happens until you stop growing around age _____or ____
20 or 22
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