w7 bone formation Flashcards
bone unlike cartilage, requires or doesnt require a good blood supply
does require
developing bone order
mesenchymal cells -> osteoprogeniotor cells -> osteaoblasts -> that produces small bony spicules -> fuse to for larger bone tissue -> remdeled by osteoclasts and osteoblast
what cartilage “model” w the general shape of the bone forms the mesenchyme
hyaline cartilage
cells along the outer what surface differentiate into osteoblasts, and secrete bone matrix forming a periosteal what
diaphyseal
bony collar
secondary centers of ossification form where
epiphyses
epiphyseal plate formed from what
hyaline cartilage that is between the epiphysis and diaphysis
what is the region between the epiphyseal disc and the diaphysis called, in which the calcified cartilage is later replaced by what
metaphysis
replaced by bone
resting zone made up of what
chondrocytes
what zone is bone remolded w bone laid down on spicules of calcified cartilage
zone of ossification
what type of osteoblast lay down near bone
periosteal osteoblasts
what does endosteal osteoclast do
resorb endosteal bone (increasing the size of the marrow cavity)
bone begins to form intially by what ossification
endochondral
primary bone abundant in what and regular or irregular collagen fibers
(immature, woven bone)
abundant osteocytes
irregular arranged collagen fibers
secondary bone what kinda of bone, what levels of osteocytes and collagen fiber direction
lamellar bone
osteocytes less abundant and more evenly spaced
collagen fibers parallel w given lamella
new bone laid down by what
osteoblast
