What happens if you breathe in the air?

What occurs when you breathe in air?

When you take a breath in, the air flows into your lungs, allowing oxygen from that air to enter your bloodstream. Concurrently, carbon dioxide—a byproduct of metabolism—is transferred from your bloodstream to your lungs and then expelled from your body when you exhale. This exchange of gases, referred to as gas exchange, is vital for sustaining life.