Which of the following helps in increasing the volume of the... — Zoology | Mockzy

HardZoologyBreathing and Exchange of Gases

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Which of the following helps in increasing the volume of the thoracic chamber?

Contraction of diaphragm

Contraction of external intercostal muscles

Relaxation of diaphragm

Both A and B

Inspiration occurs if the pressure within the lungs (intra-pulmonary pressure) i

Expiration is a passive process that occurs when:

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