Question

The phrenic nerve serves the __________.

-ear
-diaphragm
-shoulder
-neck

Answer 1

Answer: diaphragm

Step-by-step explanation:

The diaphragm is a dome-shaped muscle located at the base of the chest that separates the thoracic cavity (containing the heart and lungs) from the abdominal cavity. It plays a crucial role in respiration, as it contracts and flattens during inhalation, allowing the lungs to expand and draw in air.

Answer 2

The phrenic nerve serves the Diaphragm.

Step-by-step explanation:

The phrenic nerve serves the diaphragm, a crucial muscle responsible for breathing. Originating from the cervical spine (specifically C3, C4, and C5), the phrenic nerve travels down through the neck and chest, ultimately reaching the diaphragm. As it innervates the diaphragm, the phrenic nerve plays a vital role in the respiratory process, facilitating the contraction and relaxation of the diaphragm muscle.

This mechanism allows for the expansion and contraction of the chest cavity during inhalation and exhalation, enabling the intake of oxygen and expulsion of carbon dioxide. Without the phrenic nerve's involvement, the diaphragm would be unable to perform its essential function in the respiratory system. Consequently, the proper functioning of the phrenic nerve is crucial for sustaining normal breathing patterns and respiratory health.