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In rabbit the inspiration occurs by cont...

In rabbit the inspiration occurs by contraction of

A

External intercostal muscles and muscles of the diaphragm

B

Internal intercostal muscles and muscles of the diaphragm

C

External intercostal muscles only

D

Muscles of the diaphragm only

Text Solution

Verified by Experts

The correct Answer is:
A
During inspiration thoracic cavity increases and pressure decreases by:-
* Contraction of external intercostal muscles which pushes the ribs outward.
* Contraction of external intercostal muscles which
pushes the ribs downward.
* Relaxation of abdominal muscles.
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