In mammals ventilation movements of lungs are governed by.

Muscular wall of lungs

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Intercostal muscles

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Diaphragm

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Diaphragm and intercostal muscles.

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Solution

The correct option is D Diaphragm and intercostal muscles.
The relaxation and contraction of the diaphragm,
and the movement of the intercostal muscles present in the thorax of an individual are responsible for the ventilation movements of the lungs that facilitate respiration.
Hence, Option D is correct.

Suggest Corrections

	Action during inhalation	Action during exhalation
external intercostal muscles	Contract
Internal intercostal muscles
ribs		move down and in
diaphragm
volume of thorax
pressure in thorax
volume of air in lungs