thorax

Question 1

what is the thorax?

Answer 1

the region of the trunk that includes: costal cartilage, ribs, sternum, thoracic vertebrae, and the structures they enclose

Question 2

where is the superior thoracic aperture?

Answer 2

at the root of the neck and in continuity with the neck

Question 3

where is the inferior thoracic aperture?

Answer 3

closed by the diaphragm

Question 4

what are the 3 compartments of the thorax?

Answer 4

left and right pleural cavities and mediastinum

Question 5

what major vessels come from the heart?

Answer 5

vanae cavae, aorta, pulmonary trunk & main branches, and pulmonary veins

Question 6

what is the structure of the diaphragm?

Answer 6

musculotendinous

Question 7

where do the muscle fibres of the thorax arise and converge?

Answer 7

radially from costal margins and insert into central tendon

Question 8

which side is the dome shaped diaphragm higher?

Answer 8

right, due to presence of liver

Question 9

what kind of muscle is the diaphragm?

Answer 9

skeletal

Question 10

what nerve supplies the diaphragm?

Answer 10

phrenic, C3-5, contains motor and sensory fibres

Question 11

what happens to the diaphragm on inspiration?

Answer 11

it flattens to increase capacity of thoracic cavity