Inspiration in cockroach is a passive process and expiration is an active process. Justify. (U)
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Inspiration in cockroach is a passive process as it involves the relaxation of tergo-sternal muscles which increases the space of the body cavity and pressure is decreased. Air is carried via tracheoles and diffuses into tissues via fluid while expiration is active because it involves muscle contraction which decreases the body cavity space and pressure is increased and Co2 is exchanged out.
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