NEET BIOLOGY

Detailed explanation-1: -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-2: -The villi and microvilli greatly increase the surface area of the small intestine and are supplied with a network of capillaries and a large lymph vessel called lacteal. The lacteal absorbs fatty acids and glycerol.

Detailed explanation-3: -Despite being hydrophobic, the small size of short-chain fatty acids enables them to be absorbed by enterocytes via simple diffusion, and then take the same path as monosaccharides and amino acids into the blood capillary of a villus.

Detailed explanation-4: -Nutrients diffuse into the enterocytes and can enter either the capillaries or the lacteals. The capillaries take up water-soluble nutrients, which can then enter the bloodstream. And the lacteals take up fat-soluble nutrients, such as vitamins A, D, E, and K.

Detailed explanation-5: -Lacteals are lymphatic vessels found in small intestinal villi. While other nutrients such as amino acids and saccharides are absorbed into the blood stream, lacteals absorb fat. Occurring in the fingerlike villi of the ileum, lacteals have a milky appearance and drain into the lymphatic system.