Question

describe how does our digestive system works

Answer 1

There are several organs and other components involved in the digestion of food. The organs known as the accessory digestive glandsare the liver, gall bladder and pancreas. Other components include the mouth, salivary glands, tongue, teeth and epiglottis.

The largest structure of the digestive system is the gastrointestinal tract (GI tract). This starts at the mouth and ends at the anus, covering a distance of about nine (9) metres.[2]

The largest part of the GI tract is the colon or large intestine. Water is absorbed here and the remaining waste matter is stored prior to defecation.[1]

Most of the digestion of food takes place in the small intestine.

A major digestive organ is the stomach. Within its mucosa are millions of embedded gastric glands. Their secretions are vital to the functioning of the organ.

There are many specialised cells of the GI tract. These include the various cells of the gastric glands, taste cells, pancreatic duct cells, enterocytes and microfold cells.

Some parts of the digestive system are also part of the excretory system, including the large intestine.

Answer 2

The digestion of food starts from our mouth as physical digestion includes chewing and grinding and chemical digestion including release of saliva from salivary gland.Then,food goes to stomach by a movement called peristaltic movement and in stomach it receives gastric juices like hcl, mucus and pepsin.These gastric juices acts as digestive enzymes and then food goes to small intestine and further in large intestine where it receive enzymes like bile from liver and other enzymes from pancreas which digests rest undigested food.

This is the whole process.


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