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प्रश्न
Give any four reasons why water is necessary in our body.
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उत्तर
Importance of water in our body:
- Water is the major component of blood, which carries nutrients and oxygen, to and from all the cells.
- It is the major component of saliva and mucous, which lubricate the membranes that line our digestive system beginning with the mouth.
- It helps in regulating the temperature of the body.
- Water is very essential for digestion as well as absorption of food.
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संबंधित प्रश्न
What is the other name of food pipe?
Draw a labelled diagram of the human digestive system. With the help of this diagram, describe the process of digestion of food in man (humans).
| The partially digested food coming from the stomach of a person enters a long and narrow organ A in his body. The organ A receives the secretion of two glands : liver and pancreas. Liver secretes a greenish-yellow liquid B which is normally stored in the organ C. Pancreas secretes pancreatic juice which contains three digestive enzymes D, E and F. The intestinal juice completes the process of digestion of food. The inner wall of organ A has millions of tiny finger-like projections G which help in the rapid absorption of digested food into blood stream. The undigested part of food then passes into wider tube H which absorbs most of the water from undigested food. The last part of tube H called I stores this undigested food (or waste) for some time. The undigested food is then passed out though opening J as faeces in the process known as K. |
- Name the organ A.
- Name (i) liquid B, and (ii) organ C.
- What are the digestive enzymes D, E and F?
- Name the projections G present on the inner wall of organ A.
- Name (i) tube H (ii) part I (iii) opening J, and (iv) process K.
Explain the process of digestion of food in mouth, stomach and small intestine in human body.
What are the main characteristics of enzyme?
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`"i" 3/4 "c" 0/0 "pm" 0/1 "m" 1/1`
State the total number of teeth present in the dentition.
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Lipase
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Give reasons for the following.
Meat eating animals have strong canines.
Answer in detail.
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Name the enzymes secreted by the following: Salivary glands
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Name the salivary glands in our mouth?
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