Following illustration depicts the mechanism of breathing. …

Biology Breathing and Exchange of Gases Single Correct MCQ

Published on: August 20, 2026

Following illustration depicts the mechanism of breathing. In which of the following option all the parts A. B, C and D are correctly labelled?

A-Air entering into lungs; 8- Ribs and sternum raised; C-Diaphragm contracted; D-Volume of thorax raised

A - Air expelled from lungs; B - Ribs and sternum return to original position; C - Diaphragm relaxed; D - Volume of thorax decreased ..

A-Air expelled from lungs; B- Ribs and sternum raised; C - Diaphragm relaxed; D -Volume of thorax decreased

A-Air expelled from lungs; B- Ribs and sternum raised; C-Diaphragm contracted; D-Volume of thorax decreased

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