Chapter 7: Axial skeleton; thoracic cage/thorax

Question 1

What is the sternum and how many parts of the sternum are there?

Answer 1

Its the breast bone, there are 3 main parts

Manubrium - superior part
body - central, largest part

xiphoid process - inferior smallest part

Question 1

How many bones are in the thoracic cage/thorax?

Answer 1

25

Question 2

What muscle attaches to the xiphoid process?

Answer 2

rectus abdominis muscle

Question 3

What are true ribs and how many are there?

Answer 3

ribs that connect directly to the sternum via costal cartilages.

There are 7 pairs, 14 total (ribs 1-7)

Question 4

How many ribs are there?

Answer 4

24 total, 12 pairs

Question 5

What are false ribs and how many are there?

Answer 5

Ribs that do not join directly to the sternum via costal cartilages.

There are 5 pairs, 10 total (ribs 8-12)

Question 6

What are floating ribs and how many are there?

Answer 6

do not join directly or indirectly with the sternum

There are 2 pairs, 4 total (ribs 11 and 12)