Nutrient Absorption in the Human Digestive System
Explore the process of nutrient absorption in the human digestive system, including passive diffusion, active absorption, and phagocytosis. Learn about the site of absorption and the end products of digestion in carbohydrates, proteins, and fats.
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Presentation Transcript
Nutrition and Digestion PART-V Dr. Keshav Singh Associate Professor Department of Zoology D.D.U Gorakhpur University, Gorakhpur
ABSORPTION Absorption refers to the movement of nutrients, water and electrolytes from the lumenofthesmallintestineintothecell,then into the blood. In human about 8-9 liters of fluid is , thus absorbed from gastrointestinal tracteveryday.
Nutrient Absorption Passive diffusion: driven by concentration; fats, water, some minerals Active absorption: uses energy; glucose and amino acids Phagocytosis and pinocytosis: absorptive cells engulf compounds, generally larger molecules, as in immune substances in breast milk
Absorption Digestion small particles End products of digestion: Carbohydrates monosaccharides Proteins amino acids Fats glycerol, fatty acids
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