Question

Earthworm exchange of gases with external environment occurs through the

Answer 1

Earthworms and amphibians exchange gases with the external environment through their skin in order to facilitate gas exchange with the circulatory system.

Step-by-step explanation:

Earthworms and amphibians, including salamanders and frogs, use their skin as a respiratory organ for gas exchange with the external environment. Just below the skin, there is a dense network of capillaries that facilitates the exchange of gases between the environment and the circulatory system. In order for the gases to dissolve and diffuse across cell membranes, the respiratory surface must be kept moist.