Which thoracic muscles are involved in expiration? (Check all that apply.)
A) External intercostals
B) Internal intercostals
C) Scalene muscles
D) Transversus thoracis

Question

Quizplus · Accepted Answer

The internal intercostals and transversus thoracis are involved in expiration. Internal intercostals help depress the ribs, while transversus thoracis assists in pulling the rib cage down during forced expiration.

Which Thoracic Muscles Are Involved in Expiration? (Check All That