Respiratory structures of two different animals-a fish and a human being are shown. <img class="size-medium wp-image-72593 aligncenter" src="https://flasheducation.online/wp-content/uploads/2025/06/Respiratory-structures-of-two-different-animals-a-fish-and-a-human-being-are-shown-300x200.webp" alt="Respiratory structures of two different animals-a fish and a human being are shown" width="300" height="200" /> Observe (A) and (B) and select one characteristic that hold true for both of them. (a) Both are placed internally in the body of animal. (b) Both have thin and moist surface for gaseous exchange. (c) Both are poorly supplied with blood vessels to conserve energy. (d) In both the blood returns to the heart after being oxygenated.

(b) Both have thin and moist surface for gaseous exchange Explanation: Both gills in fish and lungs in humans are adapted for efficient gas exchange. They share the characteristic of having a thin and moist surface, which facilitates the diffusion of oxygen and carbon dioxide.

Question

Respiratory structures of two different animals-a fish and a human being are shown.

Observe (A) and (B) and select one characteristic that hold true for both of them.
(a) Both are placed internally in the body of animal.
(b) Both have thin and moist surface for gaseous exchange.
(c) Both are poorly supplied with blood vessels to conserve energy.
(d) In both the blood returns to the heart after being oxygenated.

June 27, 2025

Answer

(b) Both have thin and moist surface for gaseous exchange

Explanation:

Both gills in fish and lungs in humans are adapted for efficient gas exchange.
They share the characteristic of having a thin and moist surface, which facilitates the diffusion of oxygen and carbon dioxide.