Question

Which of the following statements comparing respiration in fish and in mammals is correct?

Answer 1

Answer: The following statements comparing respiration in fish and in mammals is correct:

• The movement of the respiratory medium in mammals is bidirectional, but in fish it is unidirectional.

Explanation:

Breathing is the process by which living beings exchange gases with the external environment. It consists of the entry of oxygen into the body of a living being and the exit of carbon dioxide from it .

Active ventilation occurs if the animal produces the currents (of air or water) that flow to and from its respiratory membranes. It can be :

• Unidirectional. (air or water is pumped onto the respiratory membrane in only one direction).
• Bidirectional. (air or water is transported to the respiratory membrane and moves away from it through the same route like in the mammals).