1. What is the digestive system of the human body? What other parts of the digestive tract are there besides digestion?

(1) The human digestive system consists of digestive tract and digestive glands. The digestive tract is oral cavity, pharynx, esophagus, stomach, small intestine, large intestine and anus from top to bottom. The digestive glands are salivary glands, stomach glands, liver, intestinal glands and pancreas.

(2) The liver is the largest digestive gland in the human body, and the digestive juice it secretes is bile, which emulsifies fat.

(3) The small intestine is about 5-6 meters long; There are many folds and villi in the small intestine, which greatly increases the digestion and absorption area of the small intestine; The villus wall, capillary wall and lymphatic capillary wall of small intestine are all composed of a layer of epithelial cells, which is beneficial to the digestion and absorption of nutrients. The small intestine contains digestive juices such as intestinal juice, pancreatic juice and bile, which can digest fat, sugar and protein. Therefore, the main place to digest food and absorb nutrition is the small intestine.

(4) The stomach can only absorb a small amount of water, inorganic salts and alcohol.

(5) The pharynx is not only a channel for breathing, but also a channel for digestion. This is the same passage for natural gas and food.

So the answer is: (1) digestive tract.

(2)⑥ Liver

(3) Small intestine

(4) Alcohol

(5) pharynx