Lec 16 - Osteon model & Ossification Flashcards
Whats the nam of each ring on a osteon?
Concentric lamellae
What does the central canal contains?
Blood vessels & nerve (Haversian system)
Lacunae
cavities, house osteocytes
Canaliculi
connects lacunae
Whats the remaining of resorbed osteons called?
Interstitial lamellae
Name the rings inside the periosteum
Circumferential lamellae
What connects ajacent ‘central canals’ of osteons?
Volkmann’s canals
What forms the porous structure of spongy bone?
Trabeculae (branching ribs)
Trabeculae are covered by_____?
Endosteum
Function of spongy bone
- Resistance
- Propective framework for bone marrow
T/F
Spongy bone have osteons/central canals?
FALSE
(It does not)
List the structures that spongy bone does have
- Concentric lamellae
- Canaliculi
- Lacunae
- Osteocytes
whats the name of the first formed bone?
Primary bone
(irregular collagen bundles)
T/F
The primary bone has many osteocytes & little inorganic matrix?
TRUE
Primary bones develope into__________?
Secondary (Lamellar bone)
(regular arranged collagen bundles)
List the bundles for each bone class
Primary - Iregular collagen bundles
Secondary - Regular arranged collagen bundles
T/F
Secondary bone has more inorganic matrix than primary bones
TRUE
Name the 2 types of ossification
- Intramembranous
- Endochondral
Intramembranous ossification location & origins
Location: Flat bone of skull, Clavicle
Origins: Mesenchymal membrane (embryonic connective tissue)
T/F
inna spongy bone forms before compact bone at primary ossification center?
TRUE
Endochondral begins as____?
Cartilage
What bones are formed by Endochondral ossification?
(Bones location)
All bones below the skull
(except clavicle)
Which type of cartilage does Endochondral ossication start from?
Hyaline cartilage
Name the properties that the hyaline cartilage of (endochondral ossification) is consist of?
-Chondrocytes
-Cartilage ECM
-Perichondrium, with -chondroblast
