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Anatomy

Bone

Lecture 2Bone Tissue
osteogenic cell develops into an osteoblast , stem cell
osteoblast cell forms bone tissue, makes matrix
osteocyte cell maintains bone tissue
osteoclast cell destroys bone material,white blood cell
extracellular matrix 25% water, 25% protein/organic matrix, 50 % crystalized mineral salts
dangers of lead, gold, strontium, plutonium radiation from the inside out, causes cancer, can get in bone matrix
compact bone arranged in osteons or haversian systems
osteons or haversian canel contain blood vessels, lymphatic vessels and nerves
concentric rings surround osteon or canel
lines of stress osteons are aligned in same direction along lines of stress
osteon is concentric rings (lamellae) of calcified matrix
Osteocytes found lacunae
osteocytes communicate canaliculi
canaliculi filled with extracellular fluid and connect cells to each other
interstitial lamellae older osteons
outer circumferential lamella outside of bone, grows after pressure is applied
nutrient foramen hole vessels enter
spongy bone made from trabeculae
trabeculae thin plates of bone that form around stress planes
red bone marrow located between trabeculae
place blood cells develop red marrow
spongy bone found ends of long bones and inside flat bones
spongy bones and osteons? no osteons
end of bone name epiphyses
Created by: nurselauren