Question

. What are the important features of all respiratory structures in animals? three points

Answer 1

Explanation:

(i) All respiratory organs have large surface area to get enough oxygen. (ii) They are thin-walled for easy diffusion of gases and substances. (iii) They have rich supply of blood for transporting respiratory gases.

Answer 2

Answer:

(i) All respiratory organs have large surface area to get enough oxygen.

(ii) They are thin-walled for easy diffusion of gases and substances.

(iii) They have rich supply of blood for transporting respiratory gases.