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When food is put in our mouth, the teeth...

When food is put in our mouth, the teeth cut, chew and grind it. The glands A present in mouth secrete a watery liquid B which helps to digest component C present in the food partially. This partially digested food then passes through tube D into an organ E. The inner walls of organ E secrete mucus, hydrochloric acid and digestive juices.
What is A?

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The correct Answer is:
Salivary glands
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When a person puts food in his mouth, then teeth cut it into small pieces, shew and grind it. The glands A in the mouth secrete a substance B which is mixed with the food by tongue. The substance B contains an enzyme C which starts the digestion of food in the mouth. The slightly digested food from the mouth goes down a tube D. The special type of movements E in the walls of tube D push the food into stomach for further digestion. The stomach wall secretes gastric juice containing three substance F, G and H. One of the functions of F is to kill bacteria which may enters the stomach with food. The substance G protects the inside layer fo stomach from the damaging effect of substance F whereas substance H is an enzyme for digestion. The partially digested food then enters into small intestine for further digestion. (a) What is (i) gland A (ii) substance B, and (iii) enzyme C ? (b) Name the tube D. (c) What is the movement E known as ? (d) What are (i) F (ii) G, and (iii) D ?

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Many secretory glands are present in the digestive glands. Thiese glands release digestive juices for the digestion of food. Which organ of the digestive system secretes bile?

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 secretions of two glands : liver and secretes a greensih 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 million of tiny finger-like projections G which help in the rapid absorption of digested food into blood stram. 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. (a) Name the organ A. (b) Name (i) liquid B, and (ii) organ C (c) What are the digestive enzymes D, E and F ? (d) Name (i) tube H (ii) part I (iii) opening J, and (iv) process K

LAKHMIR SINGH & MANJIT KAUR-NUTRITION IN ANIMALS-EXERCISE
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  3. When food is put in our mouth, the teeth cut, chew and grind it. The g...

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  4. When food is put in our mouth, the teeth cut, chew and grind it. The g...

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  5. When food is put in our mouth, the teeth cut, chew and grind it. The g...

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  6. When food is put in our mouth, the teeth cut, chew and grind it. The g...

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  7. When food is put in our mouth, the teeth cut, chew and grind it. The g...

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  8. When food is put in our mouth, the teeth cut, chew and grind it. The g...

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  9. The partially digested food coming from the stomach enters into a long...

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  10. The partially digested food coming from the stomach enters into a long...

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  11. The partially digested food coming from the stomach enters into a long...

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  12. The partially digested food coming from the stomach enters into a long...

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  13. The partially digested food coming from the stomach enters into a long...

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  14. The partially digested food coming from the stomach enters into a long...

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  15. The partially digested food coming from the stomach enters into a long...

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  16. The digested food in small intestine is absorbed into blood vessels in...

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  17. The digested food in small intestine is absorbed into blood vessels in...

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  18. The digested food in small intestine is absorbed into blood vessels in...

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  19. The digested food in small intestine is absorbed into blood vessels in...

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  20. The digested food in small intestine is absorbed into blood vessels in...

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