Skeleton of the Thorax

Question 1

What does the skeleton of the thorax contain?

Answer 1

sternum, ribs, thoracic vertebrae

Question 2

What are the parts of the sternum?

Answer 2

manubrium
body
xiphoid process

Question 3

What is the sternal angle?

Answer 3

junction of manubrium and body

site for attachment of 2nd costal cartilage

Question 4

What is the xiphoid process? What is it for?

Answer 4

attachment of 7th rib, location of subcostal angle

Question 5

When does the xiphoid process ossify?

Answer 5

40

Question 6

What does the sternum provide attachment for?

Answer 6

clavicle
ribs
muscles of neck, thorax and abdomen

Question 7

How many ribs are there?

Answer 7

24 (12 pairs)

Question 8

What is a costal cartilage

Answer 8

hyaline cartilage at the anterior end of all ribs

Question 9

Which ribs are true ribs?

Answer 9

1-7

Question 10

Which ribs are false ribs?

Answer 10

8-12

Question 11

What are true ribs also known as

Answer 11

vertebrosternal

Question 12

What are false ribs also known as

Answer 12

vertebrochondral

Question 13

Why are there true and false ribs?

Answer 13

true ribs attach directly to the sternum, and false ribs attach indirectly to sternum via the costal cartilage of rib 7 or do not attach at all

Question 14

Which ribs are floating ribs? Why are they called that?

Answer 14

11-12, do not attach to sternum

Question 15

What is the subcostal angle

Answer 15

the two costal margins meet at xiphoid process to form subcostal angle

Question 16

Why is the subcostal angle important

Answer 16

measuring this angel may help defining body type

Question 17

What are the body types?

Answer 17

ectomorph, mesomorph, endomorph

Question 18

A subcostal angle of equal to 90 degrees is what body type

Answer 18

ectomorphe

Question 19

A subcostal angle of greater than 90 degrees is what body type

Answer 19

mesomorphe

Question 20

A subcostal angle of less than 90 degrees is what body type

Answer 20

endomorphe