The ventilation movements of the lungs in mam | vedclass

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(C) The ventilation movements of the lungs (breathing) in mammals are primarily governed by the diaphragm and the intercostal muscles.$1$. The diaphra

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Both $(A)$ and $(B)$

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(C) The ventilation movements of the lungs (breathing) in mammals are primarily governed by the diaphragm and the intercostal muscles.$1$. The diaphragm is a dome-shaped muscular sheet that separates the thoracic cavity from the abdominal cavity. Its contraction increases the volume of the thoracic cavity in the antero-posterior axis.$2$. The intercostal muscles (external and internal) are present between the ribs. The contraction of external intercostal muscles lifts up the ribs and the sternum,causing an increase in the volume of the thoracic cavity in the dorso-ventral axis.$3$. Together,these movements create a pressure gradient that allows air to move in and out of the lungs.

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

Similar Questions

Select the incorrect option regarding the process of inspiration as represented in the diagram.

Arrange the given steps of expiration in the sequence of events occurring first:
$I.$ Relaxation of the diaphragm and sternum
$II.$ Reduction of the pulmonary volume
$III.$ Expulsion of air from the lungs
$IV.$ Increase in intra-pulmonary pressure
Choose the correct option.

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because

The diagram above shows which phenomenon of respiration?

The intake and output of air from the lungs is helped by

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