Skin of earthworm and gills of fish are thin, moist and richly supplied with blood capillaries.
Answers
Explanation:
Earthworms do respire through their skin. ... Each gill filament has a rich supply of blood capillaries that facilitate gas exchange. - Insects have tracheal system for respiration. Spiracles are the external pores through which the air enters and then passes into tracheae
Answer: Earthworms do respire through their skin. by diffusion. Their skin is always moist to facilitate this and they have thin capillaries under the skin. Air is taken through the skin and oxygen is drawn into capillaries. The heart pumps oxygen throughout the body and carbon dioxide dissolves out of the blood back to the skin. That's why worms suffocate when they dry out.
- In fish, gills are the organs that mediate the gas exchange. The water around always keeps the gills wet. Gills are limited to a small section of the body but provide an immense respiratory surface created by gill filaments that provide an efficient gas exchange for the whole animal. Each gill filament has a rich supply of blood capillaries that facilitate gas exchange.