Question

Sketch and label a diagram of the digestive system and describe it in your own words.

Answer 1

Major constituent organs of the human digestive system are buccal cavity, oesophagus, stomach, small intestine, large intestine, rectum, and anus.
Buccal cavity - It includes the teeth, saliva, and tongue. The teeth break down the food. Digestion of food begins in the mouth. The tongue helps in the chewing and swallowing of food.
Oesophagus - The food passes from the mouth, down the oesophagus, into the stomach, as a result of the movement of the walls of the oesophagus.
Stomach - It mixes the food received from the oesophagus with digestive juices.
Small intestine - The food from the stomach moves into the small intestine, which receives intestinal juices from two glands - liver and pancreas. These juices help in the further digestion of food.
Large intestine - Water is absorbed in the large intestine.
Rectum and anus - Undigested food particles are thrown out with the help of the rectum and anus.