Which muscle separates the thoracic and abdominal cavities and is also the chief breathing muscle?
A)Serratus anterior
B)Intercostal muscle
C)Sternocleidomastoid
D)Diaphragm

Question

Quizplus · Accepted Answer

The diaphragm is a dome-shaped muscle that separates the thoracic and abdominal cavities and plays a crucial role in breathing. Contraction and relaxation of the diaphragm muscle enable inhalation and exhalation of air.

Which Muscle Separates the Thoracic and Abdominal Cavities and Is