What are the primary muscles of respiration?

A) Diaphragm and intercostals
B) Sternomastoids and scaleni
C) Trapezii and rectus abdominis
D) External obliques and pectoralis major

Primary Muscles

The main muscles responsible for initiating and executing the movement of various parts of the body.

Diaphragm

A large, dome-shaped muscle located at the base of the lungs that plays a crucial role in breathing, contracting and flattening to allow air into the lungs.

Intercostals

Muscles situated between the ribs that play a role in the mechanics of breathing.