Question

State the three common features of all the respiratory organs like skin, gills and lungs.

Answer 1

All respiratory organs, such as the skin, gills, and lungs, share three common structural features:

• Large Surface Area: They possess a large surface area to maximise the total amount of gas that can be efficiently exchanged at any given time.
• Thin Respiratory Surface: They feature extremely thin walls to allow rapid, easy diffusion of oxygen (O₂) and carbon dioxide (CO₂) across the membrane.
• Rich Blood Supply: They are surrounded by a rich blood supply that carries absorbed oxygen away to the body tissues and removes carbon dioxide waste from the respiratory surface.