SKELETAL SYSTEM: Bone Formation Flashcards
1
Q
What is the process of bone formation called?
A
Ossification
2
Q
What are the 4 situations that bone formation/ossification occurs?
A
- formation of bone in an embryo
- growth of bones until adulthood
- remodeling of bone
- repair of fractures
3
Q
When does bone formation occur in an emryo?
A
Ossification occurs during the 6th week of embryotic development
4
Q
What is intramembranous ossification?
A
- Forms flat bones of the skull
- soft spots that help the fetal skull pass through the birth canal later become ossified forming the skull
5
Q
What is endochondral ossification?
A
- the replacement of cartilage by bone
- most bones of the body are formed in this way, including long bones
6
Q
How does longitudinal bone grow?
A
cartilage continually grows and is replaced by bone
7
Q
How do bones change as they lengthen?
A
Growing bones widen as they lengthen
8
Q
What is appositional growth?
A
The growth of a bone by additional tissue to its surface
9
Q
When is bone resorbed? (osteoclasts)
A
endosteal surface
10
Q
When is bone added? (osteoblasts)
A
penosteal surface
