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What is Digestive system ?
Did u think , we eat food where it will go ? What happen with it ? That food is digested by digestive system present in most living organism .The digestive system convert complex food into simple one .The digestive system is made up of the organ which can able to digest the food ,i.e mouth , oesophagus ,stomach ,liver ,gall bladder , small intestine , large intestine , rectum and anus.
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Organs takes place in digestive system :
The organs collaborate to form digestive tract.The food get slowly digested as it passes through various organs .The organs are as follow,
a) Mouth :
Mouth is the first and start of digestive system.The teeth i.e buccal cavity is available in mouth .The salivary gland is present in the mouth .
b) Oesophagus :
The oesophagus is also called food pipe .In oesophagus the food doesn’t stay it only pass on that’s why it’s called food pipe .
c) Stomach :
The stomach is muscular organ .It receive food from oesophagus .The stomach secret acid and enzyme that digest food .
d) Liver :
The liver is large organ .It helps in digest food and store energy .
e) Gallbladder :
Gallbladder is a small pouch like structured which lay under liver .It contain bile juice .Bile helps in digestion .
f) Small Intestine :
Small intestine is a pipe like structure .It absorb mineral and nutrients from the digested food .It is located under the large intestine .
g) Large Intestine :
The large intestine is located under the stomach .It absorb water and remaining mineral from digested food .
h) Rectum :
Rectum is an end part of large intestine .In rectum the digested food in the form of faeces is waited for excretion .
i) Anus :
The anus is the last organ of digestive system .The faeces is discarded through anus.
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Process of Digestion of Food in Humans :
The digestion of food takes place just because of the digestive system .When the organism ingest the food through excrete the food is conducted by digestive system .
1) Human take food which enters in the mouth.In mouth the saliva through salivary gland is added into the food .
2) The teeth crash the food and make it in paste form which is easily swallow.
3) Then the food goes into the oesophagus ,it works as a food pipe .
4) From oesophagus the food enters into the stomach , In stomach the food get digested .
5) The stomach add acids and enzyme to digest the food .
6) The liver and gallbladder add enzymes and bile juice which help in digestion of food .
7) From complex food the food is converted into simple one , which then enters into small intestine in which the villi is present .
8) The villi and the wall of small intestine absorb all nutrient and minerals from food .
9) Then the leftover digested food enters into large intestine in which remaining mineral and water is absorbed .
10) The digested food in the form of faeces then go into rectum .In rectum it waits for discarding .
11) At the time of excretion the faeces excreted out of the body through anus .
- Question based on the topic:
1) What is Digestive System ?
2) Which organs takes place in digestive system ?
3) Explain the process of the digestion of food in human .
4) Draw the diagram of Digestive System .
5) How many organs takes place in Digestive System .