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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9

The longest part of alimentary canal is ______. - Science

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Question

The longest part of alimentary canal is ______.

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Solution

The longest part of alimentary canal is small intestine.

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Chapter 20: Organ Systems in Animals - Exercise [Page 244]

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Samacheer Kalvi Science [English] Class 9 TN Board
Chapter 20 Organ Systems in Animals
Exercise | Q II. 4. | Page 244

RELATED QUESTIONS

The opening of the stomach into the intestine is called ______.


How is the small intestine designed to absorb digested food?


The enzyme responsible for the digestion of proteins in the small intestine is _____________.


Assertion: All proteins in our food are digested in the small intestine only.

Reason: The protein digesting enzymes are released into the small intestine.


Read the following statements with reference to the villi of small intestine.

  1. They have very thin walls.
  2. They have a network of thin and small blood vessels close to the surface.
  3. They have small pores through which food can easily pass.
  4. They are finger-like projections

Identify those statements which enable the villi to absorb digested food.


Name the parts of the alimentary canal where digested food gets absorbed.


Match the organs in Column I with the words listed in Column II.

Column I Column II
(a) Rectum (i) Mucus
(b) Gall bladder (ii) Villi
(c) Stomach (iii) Taste buds
(d) Tongue (iv) Faeces
(e) Small intestine (v)  Bile juice

Finger-like projections enhance the absorbing capacity of the small intestine.


Assertion (A): The inner walls of the small intestine have finger like projections called villi which are rich in blood. 

Reason (R): These villi have large surface area to help the small intestine in completing the digestion of food.


Visit a doctor and find out:

  1. Under what conditions does a patient need to be on a drip of glucose?
  2. Till when does a patient need to be given glucose?
  3. How does glucose help the patient recover?

Write the answers in your notebook.


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