Ribs

Question 1

In what part of the rib will primary centers of ossification appear?

Answer 1

the body

Question 2

In what parts of the rib will secondary centers of ossification appear?

Answer 2

• head
• articular surface of the tubercle
• non-articular surface of the tubercle

Question 3

When do primary centers of ossification appear in the rib?

Answer 3

during the 2nd fetal month

Question 4

When do secondary centers of ossification appear in the rib?

Answer 4

during puberty

Question 5

When do the synchondroses between the centers of ossification for the ribs ossify?

Answer 5

as early as age 20

Question 6

Which ribs will demonstrate primary centers of ossification for the body?

Answer 6

all ribs

Question 7

Which ribs will demonstrate secondary centers of ossification?

Answer 7

ribs 1-10

Question 8

Which ribs lack secondary ossification centers?

Answer 8

ribs 11 and 12

Question 9

Which ribs demonstrate three secondary centers of ossification?

Answer 9

ribs 2-9

Question 10

Which ribs have only two secondary centers of ossification?

Answer 10

ribs 1 and 10

Question 11

How does rib 1 differ in ossification centers from typical ribs?

Answer 11

• rib 1 has two secondary ossification centers: one for the head and one for the tubercle
• typical ribs have three secondary centers of ossification

Question 12

How does rib 10 differ in ossification centers from typical ribs?

Answer 12

• rib 10 has two secondary ossification centers: one for the head and one for the tubercle
• typical ribs have three secondary centers of ossification

Question 13

How do ribs 11 and 12 differ in ossification centers from typical ribs?

Answer 13

ribs 11 and 12 do not have secondary centers of ossification