What are the functions of the human digestive system?

1) mechanical processing of food; 2) chemical processing of food, digestion; 3) movement of food and removal of undigested residues; 4) absorption of nutrients, mineral salts and water into the blood and lymph.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.