Question

HELP PLEASE!

The ___________ is the main breathing muscle that expands the lungs when it contracts and forces air into the lungs.

Larynx


Trachea


Lungs


Diaphragm

Answer 1

The Trachea is the main breathing muscle

Answer 2

The diaphragm is the right answer!

"Diaphragm. The diaphragm is the major muscle responsible for breathing. It is a thin, dome-shaped muscle that separates the abdominal cavity from the thoracic cavity. During inhalation, the diaphragm contracts, so that its centre moves caudally (downward) and its edges move rostrally (upward)."