Healthy Circulatory and Respiratory Systems: the Respiratory System

Breathing is a crucial activity for living organisms, allowing for gas exchange with the environment. Humans breathe to intake oxygen and expel carbon dioxide, a waste product. This exchange primarily occurs in the lungs, where oxygen is absorbed into the blood, and carbon dioxide is released. The heart is essential in this process, pumping oxygen-depleted blood to the lungs and distributing oxygen-rich blood throughout the body.

Why do living things, including humans, need to breathe?

What happens to the oxygen we inhale?

What is the waste product released when we exhale?

Describe the role of the lungs in gas exchange.

How does the heart contribute to the process of breathing?