Wednesday, November 5, 2008
Respiratory and Circulatory Systems
Respiratory and circulatory systems are closely related. Lungs are ventilated by breathing and transport oxygen from the atmosphere to the bloodstream. Molecules of oxygen and carbon dioxide are exchanged by diffusion into the alveoli of the lungs to the pulmonary capillaries. Oxygenated blood circulates to the heart that pumps it to the systemic arteries that irrigate cells.
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1 comment:
A good, quick review of the circulatory system which is important for everyone!
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