Question

Name the group of animals in which blood is not involved in gaseous exchange.

Answer 1

Answer:

fish as the have gills and air flows with water throughout their body

Answer 2

Group of animals in which blood is not involved in gaseous exchange:

• Most of the lower animals don’t have a well developed circulatory and respiratory system. This absence leads to further adaptation where the body fluid is not involved in exchange of gases.

• But, the gases directly diffuse into the body cells of the organisms. This is called the cutaneous respiration. In cutaneous respiration the skin of the organism is wet.

• This leads to easy diffusion of gases into and outside the cells. Thus oxygen is absorbed and carbon dioxide is emitted.