Breathing

Breathing is one of the most important things your body does. But it’s not just about pulling air in and out; it powers every cell in your body.

This process starts when you inhale through your nose or mouth. Oxygen travels down the trachea into the lungs.

Inside the lungs, oxygen enters the alveoli. From there, it passes into the bloodstream through thin walls by a process called diffusion.

At the same time, carbon dioxide in the blood enters the alveoli and is exhaled through the nose or mouth.

Now, this oxygen-rich blood returns to the left atrium of the heart and is pumped through arteries to every part of the body.

From the arteries, blood reaches tiny vessels called capillaries, where oxygen moves into body cells.

Here, oxygen is used during cellular respiration to release energy from glucose, producing a fuel called ATP.

This ATP gives your body the energy to move, grow, and survive. Breathing ensures a constant supply of oxygen to keep producing that energy.