Write the main steps of nutrition in humans and also explain theteps
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the steps are as follow:-
Ingestion: The process of taking food into the body is called ingestion.Digestion: the process in which the food containing large, insoluble molecules is broken down into small, water soluble molecules is called digestion.Absorption: The process in which the digested food passes through the intestinal wall into blood stream is called absorption.
Assimilation: The process in which the absorbed food is taken in by the body cells and used for energy, growth and repair is called assimilation.Egestion: The process in which the undigested food is removed from the body is called egestion.
Ingestion: The process of taking food into the body is called ingestion.Digestion: the process in which the food containing large, insoluble molecules is broken down into small, water soluble molecules is called digestion.Absorption: The process in which the digested food passes through the intestinal wall into blood stream is called absorption.
Assimilation: The process in which the absorbed food is taken in by the body cells and used for energy, growth and repair is called assimilation.Egestion: The process in which the undigested food is removed from the body is called egestion.
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Alimentary canal :
The digestive system from Oesophagus to the anus is called alimentary canal. It's about 9 m long!
It constitutes following organs namely :
a. Buccal cavity
b. Oesophagus
c. Stomach
d. Small intestine
e. Large intestine
f. Rectum
g. Anus.
Function of the above given respectively :
a. Buccal cavity :
Human take in food through mouth. where which salivary enzymes breaks down starch into sugar.
b. Role of Oesophagus :
It allows passage of food from Buccal cavity to the stomach.
c. Role of Stomach :
Here HCL, mucus and several digestive enzymes mixed with food. Where which HCL males food acidic fit enzymes to action.
d. Role of Small intestine :
This tube has three main divisoms namely - Duodenum, jejunum and ileum. Duodenum is responsible for mixing bile and pancreatic juice with food. Jejunum is middle part going only in man.
Total absorption takes place in the ileum. This ileum has villi on the surface. This villi increases area for absorption. The villi have blood vessels, digested food passes villi to there and enters the blood stream. Which then transfer to liver and then to the heart ♥ .
e. Role of large intestine, anus and rectum :
Food from small intestine moves there. Here the most of water and salt be removed from the waste by absorbtion. This intestine all the passage of faecal matter through the anus.
The digestive system from Oesophagus to the anus is called alimentary canal. It's about 9 m long!
It constitutes following organs namely :
a. Buccal cavity
b. Oesophagus
c. Stomach
d. Small intestine
e. Large intestine
f. Rectum
g. Anus.
Function of the above given respectively :
a. Buccal cavity :
Human take in food through mouth. where which salivary enzymes breaks down starch into sugar.
b. Role of Oesophagus :
It allows passage of food from Buccal cavity to the stomach.
c. Role of Stomach :
Here HCL, mucus and several digestive enzymes mixed with food. Where which HCL males food acidic fit enzymes to action.
d. Role of Small intestine :
This tube has three main divisoms namely - Duodenum, jejunum and ileum. Duodenum is responsible for mixing bile and pancreatic juice with food. Jejunum is middle part going only in man.
Total absorption takes place in the ileum. This ileum has villi on the surface. This villi increases area for absorption. The villi have blood vessels, digested food passes villi to there and enters the blood stream. Which then transfer to liver and then to the heart ♥ .
e. Role of large intestine, anus and rectum :
Food from small intestine moves there. Here the most of water and salt be removed from the waste by absorbtion. This intestine all the passage of faecal matter through the anus.
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