Describe how the digestive system in humans is linked to the circulatory system?

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The digestive system is important because it breaks down foods to their simplest components--fatty acids and glycerol, amino acids and glucose. The amino acids and glucose can be absorbed in the villi(tiny hair-like projections in the small intestine) and enter the circulating blood via capillaries. The fatty acids however, take a different pathway. Inside the vill, are lacteals which absorb the fatty acids and these travel in the circulating lymph fluid. Eventually, in the neck region, the lymph re-enters the bloodstream once again. Therefore, there is a close connection in the small intestine with the circulatory system. Also, the blood travels through the aorta which has smaller branches to supply all the organs of the body, including the digestive system, with necessary substances including oxygen, nutrients and to remove wastes.

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