Bone Flashcards
creation/formation of bone
osteogenesis/ossification
ossifies and builds bones
osteoblasts
dissolves bones (resorption/demineralizing extra cell matrix)
osteoclast
mesenchyme condenses to form the periosteum, happens at 6 weeks of development
intramembranous ossification
outer membrane of the bone, results from condensation of mesenchyme
periosteum
embryonic connective tissue
mesenchyme
develops through intramembranous ossification, develops from a primary ossification center
flat bones
sticks to bone and prevents fractures
Ca phosphate
occurs at 2 months of development, within cartilage (hyaline)
endochondral (ossification)
forms the cartilage model
chondroblasts (make) /chondrocytes (maintains)
model hardens due to a lack of alkaline phosphates
cartilage model ossifies
dies as cartilage ossifies
chondrocytes/chondroblasts
template that is set for osteoblasts to form bone
scaffold
involves a primary and secondary ossification center
endochondral ossification
mature cell that lives in bone and maintains it
osteocyte
2/3 of bone
inorganic
2/3 inorganic material of bone, made of calcium phosphate, gives bone it’s hardness (resistance to fracture)
hydroxyapatite
1/3 of bone
organic
1/3 organic material of bone, mainly collagen fibers gives bones it’s tensible strength (bendability)
osteoid
consists of hyaline cartilage and is the location of the secondary ossification centers
epiphyseal plates of long bones
what the epiphyseal plates become once secondary ossification centers fully ossify
epiphyseal lines
what the bones form when it’s fully grown
epiphyseal lines
inside with spongy bone layer, inner bone membrane
endosteum
in contact with compact bone
periosteum