NEET BIOLOGY

Detailed explanation-1: -Final answer: Fatty acids are absorbed into the blood capillary of the villus by facilitated diffusion.

Detailed explanation-2: -Capillaries in jejunal villi can absorb glucose at rates several hundred times greater per gram of tissue than in brain or contracting skeletal muscles.

Detailed explanation-3: -The blood capillaries absorb most nutrients, but the fats and fat-soluble vitamins are absorbed by the lacteals. The lymph in the lacteals has a milky appearance due to its high fat content and is called chyle.

Detailed explanation-4: -At a later stage, the bile salts are removed and a layer of protein is formed over the fatty acid called chylomicrons. These are then transported into the lacteals present within the villi in the small intestine. These are absorbed into the lacteals by simple diffusion.

Detailed explanation-5: -Each villus contains a lymphatic vessel or the lacteal surrounded by a network of capillaries. Digested carbohydrates and proteins are absorbed by the network of capillaries while fats in the form of fatty acids and glycerol are absorbed by the lacteals.