Lecture 1 Flashcards
1
Q
Axial Skeleton Endochondral Derivatives
A
- Vertebral Column
- Ribs
- Sternum
2
Q
Appendicular Skeleton Endochondral derivatives
A
- Limbs
3
Q
Mixed endochondral and intramembranous derivatives
A
- Skull
- Clavicles
4
Q
Endochondral derivatives in Skull
A
- Cranial base and sensory capsules
- Ear ossicles and laryngeal cartilage
5
Q
Intramembranous derivatives of skull
A
- Cranial Vault
- Face
6
Q
Intramembranous Bone Growth
A
Spreading of bone spicules
7
Q
“Soft Spot”
A
Anterior fontanelle
8
Q
Skull stops growing at what age?
A
5-7 years
9
Q
Endochondral Bone Formation
A
- Mesenchyme condenses
- At primary center, Chondrocytes differentiate and form cartilage
- Chondrocytes mineralize
- Osteoblasts follow nutrient artery and bind to mineralized matrix
- Secondary centers start ongoing growth
10
Q
When does the diaphyses ossify?
A
By birth
11
Q
Formation of interverterbral discs
A
Sclerotomes and notochord
12
Q
8 cervical nerves and 7 cervical vertebrae
A
Lose half a sclerotome at skull base and another at T1
13
Q
Myoblasts
A
- Muscle precursors
- develop from mesoderm
14
Q
Splanchnic mesoderm
A
Gives rise to smooth muscle
15
Q
Muscle precursors rising from ectoderm
A
- Iris
- Mammary Glands
- Sweat Glands
