Name the source of oxygen for terrestrial animals and aquatic animals. Why is the rate of breathing in aquatic organisms faster than in terrestrial organisms?

Breathing:

• The process of moving the oxygen into the body and removing the carbon dioxide from the body through the entry and exit of air is known as breathing.

Source of oxygen:

• The source from which the organisms receive the oxygen gas for their use is the source of oxygen.
• The terrestrial animals receive oxygen from their surrounding atmosphere through their nose.
• The aquatic organisms receive the oxygen from the water in which they live through their gills. The oxygen is dissolved in the water.

Breathing rate:

• The breathing rate is the breath number an organism takes in a minute. One inhalation followed by an exhalation comprises one breath.
• The amount of dissolved oxygen in the water is less than the oxygen in the atmospheric air.
• The less oxygen in water causes the aquatic organism to breathe faster to fulfill their oxygen requirement, causing their breathing rate to become faster than terrestrial animals.