Question

In regards to a “villus” in the small intestine, discuss the roles that the capillary network and the lymphatic vessel (the lacteal) play in the movement of carbohydrates, fats, and proteins from the GI tract into the circulatory system. Please also consider what must happen to carbohydrates, fats, and proteins before they can cross into the bloodstream.

Answer 1

Lymphatic system consists of three major functions return of intestinal blood towards the blood. absorption of fat-soluble vitamins and other fats transport of fats to venous circulation.

Small intestine comprises of numerous villi and lymphatic vessels. Lacteal (lymphatic capillary) is associated with absorption of fats in the small intestine. Triglycerides are metabolized to smaller fatty acids by bile and lipase.

Carbohydrates, proteins and fats are metabolized into smaller units. Carbohydrates are converted into monosaccharides. Fats are converted into triglycerides and further to monoglycerides Proteins are converted into amino acids.