During forced expiration , actively contracting muscles

A yoga teacher is demonstrating the technique of breathing exericse during forced expiration the actively contracting muscles in his body include

A yoga teacher is demonstrating the technique of breathing exericse during forced expiration the actively contracting muscles in his body include

A yoga teacher is demonstrating the technique of breathing exericse during forced expiration the actively contracting muscles in his body include

A yoga teacher is demonstrating the technique of breathing exericse during forced expiration the actively contracting muscles in his body include

During contraction of muscles :-

During contraction of muscles :-

Which statements are correct ? (A) During inspiration intra pulmonary pressure is less than the atmospheric pressure. (B) During expiration diaphragm contract. (C) Epiglottis is bony flap which prevent entry of food into the larynx. (D) During forceful expiration abdominal muscles contract.