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Best Describes How Oxygen Enters the Lungs
Oxygen enters the bloodstream directly from the nose. When oxygen enters the lungs it passes across a structures called Alveoli part of Bronchioles part of Bronchi that are full of capillaries to allow blood to pass nearby and pick up the oxygen binding to red blood cells by osmosisThe blood which binds with oxygen is called oxygenated blood. 5 Functions Of Respiratory System Respiratory Anatomy When cells use oxygen carbon dioxide CO 2 is produced and transferred to the blood. . The heart pumps air into the blood through the lungs. This blood is carried into the heart by blood vessels which pumped out to. The pulmonary circulation is the portion of the circulatory system which carries deoxygenated blood away from the right ventricle to the lungs and returns oxygenated blood to the left atrium and ventricle of the heart. Moreover Cilia the tiny hairs keeps the lungs clean by sweeping out all kinds of debris. To support the...

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