BONE Flashcards
Specialized CT composed of calcified ECM
bone
calcified ECM is called
Bone matrix
3 major cell types
Osteocytes
Oscteoblast
Osteoclast
purpose of bone
Solid support for our body, protects organs and harbors cavities containing bone marrow where blood cells are formed.
formation of blood cells
hematopoesis
happens inside the bone
formation of blood cells happens where
medulary cavity of bone/ bone marrow
serves as reservoir of calcium, phosphate and other ions that can be released in a controlled fashion to maintain constant concentration of body fluid.
Bone matrix
normal calcium level
8.6-10.3
Aids in movement by forming system of levers that multiply forces generated during muscle contraction.
Bone
matrix that covers the bone
periosteum
periosteum layer
outer fibrous layer
inner cellular layer
perforating fiber
sharpey’s fiber
attachment to the external circumferential lamellae of bone
perforating fiber
single unit of a functioning bone
osteon
osteon is also known as
Haversian system
diff parts of osteon
central canal
nerve, vein and arteries
middle of osteon
central canal
bone is highly
vascularized
housing where osteocytes resides in
lacuna
lacuna parts
osteocyte and canaliculi
so that osteocyte can communicate with other osteocytes that is housed in other lacunae
canaliculi
maintain the bone
osteocyte
has many spaces in between
spongey bone
where can u see osteon?
compact bone