Understanding Gas Exchange

The video explains the necessity of breathing for animals, including humans, due to the need for gas exchange with the environment. It highlights how different animals, like elk and fish, breathe using various structures. The process of cellular respiration is introduced, emphasizing its role in energy production and the expulsion of carbon dioxide. The video concludes with a focus on gas exchange in respiratory systems, particularly in humans.

Why is it important for animals to breathe?

What is the process called that involves the exchange of gases in organisms?

Describe the role of oxygen in cellular respiration.

What happens to carbon dioxide during cellular respiration?

Explain how gas exchange occurs in the respiratory systems of animals.