Embryology of the Anterior Thorax Flashcards
1
Q
Primary centers of ossification for the sternum first appear at what age?
A
fifth fetal month
2
Q
In what part of the sternum will a secondary center of ossification appear?
A
the xiphoid process
3
Q
In what parts of the rib will secondary centers of ossification appear?
A
the head, articular surface of the tubercle and the non-articular surface of the tubercle
4
Q
Which ribs will demonstrate primary centers of ossification for the body (corpus or shaft)?
A
all ribs; ribs 1-12
5
Q
Which ribs will demonstrate secondary centers of ossification?
A
Ribs 1-10
6
Q
Which ribs lack secondary centers of ossification?
A
ribs 11 and 12
7
Q
Which ribs demonstrate three secondary centers of ossification?
A
ribs 2-9
8
Q
Which ribs have only two secondary centers of ossification?
A
ribs 1 and 10
