Assertion (A) : In large animals, oxygen can reach different parts of the animal's body easily.\ Re

Question

Assertion (A) : In large animals, oxygen can reach different parts of the animal's body easily.\ Reason (R) : Respiratory pigments take up oxygen from the air and carry it to body tissues.\

Professor PC Thomas Classes · Answer

(d) : When the body size of animals is large, the transport of oxygen is difficult because the diffusion pressure alone cannot take care of oxygen delivery to all parts of the body. In such organisms, respiratory pigments take up oxygen from the air in the lungs and carry it to tissues which are deficient in oxygen before releasing it.