A healthy person breathes through the nose with 1 / 2 liter of air, with more breathing (respiration) can be up to 2.5 liters, With every breath transport the bronchi the inhaled air into the lungs approximately 300 million vesicles (alveoli).
There is a gas exchange of oxygen from the air and carbon dioxide from the blood of the blood vessels of the lungs instead. Breathing (respiration), also known as external respiration is called, consists of the phases of inhalation (inspiration) and exhalation (expiration).
During inhalation, the body via the lungs oxygen bubbles, the bubbles on the lung wall against carbon dioxide is exchanged. The carbon dioxide is exhaled.
respiratory system presentation
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