Which of the nerves in this diagram would be involved with 'flexing' the chest wall to bring the ribs together?

A)A
B)C
C)D
D)E

Question

Which of the nerves in this diagram would be involved with 'flexing' the chest wall to bring the ribs together?

A)A 
B)C 
C)D 
D)E

Quizplus · Accepted Answer

The nerve labeled as C is the phrenic nerve, which is responsible for innervating the diaphragm muscle that contracts during breathing. The diaphragm muscle plays a crucial role in expanding and contracting the chest cavity during ventilation, while the intercostal muscles between the ribs also contribute to chest wall movements. When the intercostal muscles contract, the ribs move upward and outward during inspiration, whereas they move downward and inward during expiration. Therefore, the intercostal nerves may be involved in "flexing" the chest wall to bring the ribs together, but they are not clearly visible in this diagram.

Which of the Nerves in This Diagram Would Be Involved