When nutrients are absorbed in the human intestine, the concentration of these substances in the blood changes dramatically. Explain how this concentration is stabilized? Which body plays the main role in this process?
1) all blood from the intestines is collected in the portal vein of the liver and passes through the liver;
2) in this case (in the sinuses of the liver) part of the substances from the blood is taken, reducing their concentration;
3) in this way the liver maintains a constant blood composition
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