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The capillaries are the site of diffusion of wastes, oxygen, and nutrients. This allows these materials to enter and leave body tissues.
At the arterial end of a capillary bed, blood pressure is higher than at the venous end. This pressure allows nutrients, oxygen, and other essential substances to be pushed out of the capillaries and into the surrounding tissues.
Capillaries are tiny blood vessels that pass blood from the arteries into the veins. They are very small, the largest being about 10 micrometers in diameter. Their walls are thin which allows materials to pass into the capillaries. Different types of capillaries exist and perform different functions for the body. Primarily, however, the capillaries are able to profuse the tissues of the body with needed oxygen and important nutrients supplied by blood.
The capillaries allow diffusion of nutrients, waste, and oxygen through their walls, which are one cell thick. This diffusion allows transportation of nutrients and waste materials throughout the body.
When the heart leaves the left ventricle through the aorta, it moves into progressively smaller arteries and arterioles of the systemic circulation. Eventually the blood reaches the capillaries, where it allows the diffusion of nutrients and oxygen to the body tissues.
What process allows fungi to obtain nutrients from dead leaves?Read more: What_process_allows_fungi_to_obtain_nutrients_from_dead_leaves
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Diffusion is the process that allows the exchange of oxygen and carbon dioxide in the alveoli. This process is one of passive transport.
capillaries
The uptake of nutrients by villi in the small intestine is known as absorption. This process allows nutrients to move into the circulatory system.
The major function of the lungs is gas exchange. Gas exchange requires the entire cardiopulmonary system which includes the heart, lungs, and blood vessels (arteries,arterioles,capillaries,veins),. At the capillaries which is the smallest vessels with thin walls permitting diffusion and gas exchange the carbon dioxide (C02) and oxygen (02) are exchanged. It is the capillaries that allows tissues to be supplied with the essential oxygen that they need and allows the tissues get rid of the toxic waste products including C02. The waste products will travel back to the veins, back to the heart where they then go to the lungs and are expired. When an individual inhales, the oxygen is taken in via alveoli in the lungs, travel to the heart then to the arteries and then to the tissues. and the cycle continues...
the definition of the of tissue permeability is: - The absorption of substances within the body tissues. cell permeability, which allows nutrients and other substances to enter the cells more readily and allows the removal of waste products from the cells.