Question

2
Why is the rate of breathing in aquatic organisms much faster than that seen in terrestrial
organisms? How does oxygenation of blood takes place in fish?​

Answer 1

Explanation:

the amount of oxygen dissolved in water is much lower than what is present in the atmosphere so the rate of breathing is more in fish.

Answer 2

Answer:

Aquatic organisms depend on dissolved oxygen in water while terrestrial organisms absorb oxygen air. Since concentration of dissolved oxygen is much lower as compared to that of oxygen present in air, aquatic organisms breathe faster to meet the demand of oxygen.

In fish, the heart only has one atrium and one ventricle. The oxygen-depleted blood that returns from the body enters the atrium, and then the ventricle, and is then pumped out to the gills where the blood is oxygenated, and then it continues through the rest of the body