Week 5 Flashcards
Types of cartalige
hyaline, Elastic, Fibrocartalge
hyaline
found in Embryonic skeleton, surfaces of synovial joints, THE MOST COMMON)
elastic
found in ear, epiglottis
fibrocartilage
Intervertebral disks, pads within knee joint
osteoid
is the organic, unmineralized portion of the bone matrix that must be secreted prior to the maturation of bone tissue
Endochondral ossification:
(formation of bones from cartilage) occurs in long bones, and most bones except flat bones.
Intramembranous ossification
(creating bones from connective tissue [mesenchyme]) occurs in flat bones
two types of cartilage growth
Interstitial Appositional
Interstitial
growth-expands from within
Appositional
growth-increase size by adding to outer surface
Endochondral ossification
the process of replacing avascular hyaline cartilage with highly vascular bone.
-occurs mostly in newborns skulls
six steps of endochondral ossification
- The hyaline “bone” model grows
- Blood vessels invade the perichondrium/ bone collar forms
- Blood vessels invade diaphysis
- Growth and remodeling
- Blood vessels invade the epiphyses
- Epiphyseal plate (growth plate)
four steps of Intramembranous ossification
Mesenchymal cells aggregate
2: Osteoid secretion:
3: Connection
4: Remodeling
where does intramembranous ossification occur
it occurs in the dermis makes the most of the flat bones and the clavical