In rabbits,expiration occurs by the:

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Question

(B) Expiration in mammals,including rabbits,is a passive process during quiet breathing. It occurs primarily due to the relaxation of the diaphragm mu

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Contraction of the internal intercostal muscles and the relaxation of the muscles of the diaphragm

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(B) Expiration in mammals,including rabbits,is a passive process during quiet breathing. It occurs primarily due to the relaxation of the diaphragm muscles (which return to their dome-shaped position) and the external intercostal muscles. However,during forced expiration,the internal intercostal muscles contract to pull the rib cage downward and inward,further decreasing the thoracic volume and increasing thoracic pressure to expel air.

Similar Questions

State the sequence of events for inspiration (breathing in).
$I$ - Increase in lung volume
$II$ - Decrease in intrapulmonary pressure
$III$ - Contraction of respiratory muscles
$IV$ - Increase in thoracic volume
$V$ - Air rushes into the lungs

In whom is costal (rib-based) respiration more prominent?

The ventilation movements of the lungs in mammals are governed by:

Select the correct process that occurs during inspiration (inhalation):
$(a)$ Contraction of the diaphragm
$(b)$ Contraction of external intercostal muscles
$(c)$ Decrease in pulmonary volume
$(d)$ Increase in intra-pulmonary pressure

Which is the most important muscular structure in the respiratory system of a rabbit?

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