Explain the process of absorption of digested matter from digestive tract.

Explanation

(a) Absorption of carbohydrates : Carbohydrates are absorbed in the form of monosaccharides into blood capillaries of villi. Glucose and galactose is absorbed along with `Na^(+)` ions with the expenditure of energy. Fructose is absorbed by facilitated diffusion.
(b) Absorption of proteins : End product of protein digestion is amino acids. Amino acids are absorbed into blood capillaries of villi. They are absorbed along with the `Na^(+)` ions along with the wxpenditure of energy.
(c) Absorption of Fats : End products of fat digestion are diacylglycerol or monoacylglycerol or fatty acids and glycerol. In the lumen of small intestine, emulsified fat is surrounded by bile salts and form micelles. Re-synthesized fats combines with the proteins cholesterol and form .chylomicron. which enters into lacteals.