Name: Theories for Ascent of Sap
Uploaded: 2019-07-19
Duration: 5 min 10 s
Description: It's a gravity-defying stunt that the sap pulls off! How do water and minerals travel upwards from the root via the xylem? Learn the theories that explain th...

Question

Describe the Human Digestive System. Draw a labelled diagram of it.

Accepted Answer

The human digestive system consists of the alimentary canal and the associated glands. From the mouth, the food is taken to the stomach through the food-pipe or oesophagus. The stomach is a large organ which expands when food enters it. The muscular walls of the stomach help in mixing the food thoroughly with more digestive juices. The digestion in stomach is taken care of by the gastric glands present in the wall of the stomach. These release hydrochloric acid, a protein digesting enzyme called pepsin, and mucus. The hydrochloric acid creates an acidic medium which facilitates the action of the enzyme pepsin. The small intestine is the site of the complete digestion of carbohydrates, proteins and fats. Digested food is taken up by the walls of the intestine. The inner lining of the small intestine has numerous finger-like projections called villi which increase the surface area for absorption. The villi are richly supplied with blood vessels which take the absorbed food to each and every cell of the body, where it is utilised for obtaining energy, building up new tissues and the repair of old tissues. The unabsorbed food is sent into the large intestine where its wall absorb more water from this material. The rest of the material is removed from the body via the anus. The exit of this waste material is regulated by the anal sphincter.

Embibe Experts Solutions for Chapter: Life Processes, Exercise 1: Jammu and Kashmir Board-2019

Embibe Experts Science Solutions for Exercise - Embibe Experts Solutions for Chapter: Life Processes, Exercise 1: Jammu and Kashmir Board-2019

Questions from Embibe Experts Solutions for Chapter: Life Processes, Exercise 1: Jammu and Kashmir Board-2019 with Hints & Solutions

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