how does respiratory system works?
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Air comes into the body through the nose or mouth, and enters the airways. Airways are the tubes that carry air into our lungs. As they branch out, they become smaller and smaller, and eventually connect to small air sacs where fresh oxygen from the air is exchanged for carbon dioxide in the blood.
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The human respiratory system is the system which controls breathing and enables us to breathe. Breathing includes inhaling and exhaling of the air in the body, absorption of the oxygen from air into our body for providing energy, and removal of carbon dioxide (by-product of the respiration) out of our body.
The primary organ where respiration takes place is the lungs. Oxygen from the lungs is collected by the red blood cells and transported to the places it is needed while at the same time, carbon dioxide is transported back to the lungs by the red blood cells in order for removal from the body.
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