Exhalation is the process of expulsion of air through the respiratory tract. Which figure illustrate

Question

Exhalation is the process of expulsion of air through the respiratory tract. Which figure illustrates the process of exhalation?

Professor PC Thomas Classes · Answer

(d) : During exhalation, diaphragm is relaxed and arched upwards. Ribs and sternum are returned to their original position and volume of thorax decreases. This causes expulsion of air from lungs.