The respiratory gases of animals are oxygen and nitrogen ni

The respiratory gases of animals are

. oxygen and nitrogen.

nitrogen and carbon dioxide.

oxygen and carbon dioxide.

Solution

Answer: oxygen and carbon dioxide.

Reason:

Animals are vertebrates and perform their metabolic reactions using oxygen to generate ATP as energy in mitochondria in which oxygen is the chief electron acceptor finally CO2 is generated as metabolic waste product finally eliminated in the form of bicarbonate or expiration via lungs