Question

write the whole process of digestion in human body​

Answer 1

The processes of digestion include six activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation. The first of these processes, ingestion, refers to the entry of food into the alimentary canal through the mouth

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Answer 2

Answer:

The process of digestion in human body is as follows:-

• The food is broken down into simpler particles in mouth with the help of teeth.

• The digestion starts in the mouth itself.

• The food is mixed with saliva in the mouth.

• The saliva is produced by salivary glands and contains salivary amylase which turns starch into sugar.

• Then, the food passes from the mouth to the stomach through oesophagus.

• In the stomach, the food is mixed with gastric juice produced by gastric glands.

• The gastric juice contains enzyme pepsin, hydrochloric acid and mucus.

• The hydrochloric acid makes the medium of stomach acidic which eventually helps in the digestion of food with the help of enzyme pepsin.

• The enzyme pepsin digests proteins.

• The mucus on the walls of the stomach helps in protecting the walls from the action of hydrochloric acid.

• Further, the food reaches the small intestine.

• The initial part of small intestine is called as duodenum.

• In the duodenum, the food mixes with the bile juice produced from liver and stored in gallbladder. It makes the medium of food alkaline so that it does not affect the walls of small intestine as well as help in digestion of food with the help of pancreatic juice.

• The food in duodenum is also mixed with pancreatic juice produced by pancreas. The pancreatic juice contains lipase and trypsin enzymes.

• The trypsin enzyme breaks down proteins and the lipase enzyme breaks down fats.

• Further in the small intestine, intestinal juice produced by small intestine, helps in the digestion of carbohydrates into glucose, fats into fatty acids and glycerol and proteins into amino acids.

• The walls of small intestine contains some finger like projections for villi. This increase the surface area for absorption of the digested food. It is connected with blood vessels. Hence, here the absorption and the assimilation of digested food takes place.

• The digestion of food completes in the small intestine.

• Further in the large intestine, water is absorbed from the waste material.

• At last, the waste material is removed through the human body through anus.