HOW THE MATERIAL (FOOD,GAS) TRANSPORTATION TAKES IN HUMAN ?
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In human, food is ingested by the mouth then, it goes through various digestive processes and then, the nutrients of food is transported to the blood vessels through the villi present in the small intestine. The leftover food, which is of no use, I'd then passed out of the body by the process of egestion through the anus.
In human, gas is first taken through the nose or mouth and taken to the heart and lungs. After purifying the blood by the heart, the oxygen (present in the gas we breath) is transported to every single cell of the body and then it is again breathed out by the nose or mouth.
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