Bones (Pulmonary System)

Question 1

True Ribs.

Answer 1

• Pairs 1-7.
• Articulate with vertebra and directly with sternum (via costal cartilage).

Question 2

False Ribs.

Answer 2

• Pairs 8-10.
• Articulate with vertebra and indirectly with sternum (via costal cartilage of ribs 6 and 7).

Question 3

How many pairs of ribs are there?

Answer 3

12.

Question 4

What are the (3) elements of the sternum?

Answer 4

• Manubrium
• Body
• Xiphoid process

Question 5

What bones articulate at the sternocostal joints?

Answer 5

Joints between ribs 1-7 (true ribs) & sternum.

Question 6

What type of joint is it between the manubrium and 1st rib?

Answer 6

Fibrocartilaginous joint.

Question 7

Which ribs are surrounded by thin capsules?

Answer 7

Ribs 2-7.

Question 8

What are the interchondrial joints?

Answer 8

• Ribs 7-10 involved.
• Synovial joints.
• Occur between the costal cartilages of adjacent ribs.

Question 9

Floating ribs.

Answer 9

• Pairs 11-12.
• Articulate with vertebra, no attachment anteriorly to sternum.

Question 10

Which ribs are typical?

Answer 10

2-9

Question 11

Which ribs are atypical?

Answer 11

1, 10, 11 + 12

Question 12

Why is the 10th rib atypical?

Answer 12

Head of rib has 1 facet for articulation with 1 vertebral body (T10)

Question 13

Why are the 11th & 12th ribs atypical?

Answer 13

• No anterior attachment to sternum.
• Only articulate with 1 vertebral body (rib 11 = T11, rib 12 = T12).
• No tubercles.
• Shorter than the other ribs.

Question 14

What ribs are involved in interchondrial joints?

Answer 14

Ribs 7-10.

Question 15

What is the purpose of interchondrial joints?

Answer 15

Provide anchorage to the sternum.