Question

Name the source of oxygen for terrestrial animals and acquatic animals.

Answer 1

for terrestrial organism oxygen present in air which taken by lung , but for aquatic oxygen dissolve in air they take through gill

Answer 2

The oxygen source i.e., water is about 800 times denser than air. It contains less O2 as compared to air. Since the content of O2 in water is low, aquatic animals breathe faster to get as much oxygen as possible, resulting in a faster rate of breathing. Therefore, aquatic animals breathe faster than terrestrial animals and also show different adaptations for better gaseous exchange