When animals breathe, they inhale oxygen, and when they breathe out, carbon dioxide and other waste is expelled from their bodies. Blood is delivered to the capillaries surrounding the alveoli, and in the alveoli, the carbon dioxide pushes into the lungs, where it departs the body when you exhale.
Lungs bring fresh oxygen to your body. When we breathe, we pull air into our lungs that contain mostly nitrogen and oxygen. Oxygen helps our cells work harder by breaking down the nutrients that are obtained from food. With sugars, mixed with oxygen, our cells create the energy it needs to function.
When your diaphragm tightens and flattens, it permits you to bring air into your lungs. To breathe out, your diaphragm and rib cage muscles relax. Every system in the body depends on oxygen. Effective breathing is essential to improve your sense of mental clarity, cognitive function, immune response, and stress levels.