Write Names of Different Parts of Human Digestive System and Explain Functions of Any Three Parts. - Science and Technology 2


Write names of different parts of human digestive system and explain functions of any three parts.



(1) The digestive system of human beings consists of an alimentary canal and the associated digestive glands.

Alimentary canal: The human alimentary canal begins with the mouth and ends in the anus. It is a long muscular tube of varying diameter consisting of oesophagus, stomach, small intestine and large intestine. Associated digestive glands: The digestive glands associated with the alimentary canal are salivary glands and gastric glands.
(1) Mouth: In the mouth, there are teeth which masticate the food and convert the larger particles of food into smaller ones. The tongue helps in tasting the food            and rolling it into a soft ball. There are salivary glands in the mouth which secrete saliva.
(2) Oesophagus: The oesophagus is a narrow tube carrying food to the stomach. Due to peristalsis, the food is pushed forward in the alimentary canal.
(3) Stomach: The stomach is a J-shaped muscular organ situated on the left side of the abdomen. Muscles of the stomach also undergo peristalsis and push the food      forward. In the stomach, the food is mixed thoroughly with the gastric juice secreted by the gastric glands present in the stomach wall. There is a sphincter              muscle at the lower end of the stomach. This sphincter muscle releases the partially digested food into the small intestine.


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2012-2013 (March)



Fill in the blank and rewrite the completed statement: 
.................... is the largest gland in the body.

Draw neat labelled diagram of the pancreas with their associated structures

Pancreas, Gall bladder, Glomerulus, Liver

What is the function of digestive enzymes?

Mark ‘T’ if the statement is true and ‘F’ if it is false:

The tongue helps in mixing food with saliva. (T/F)

Which part of the digestive canal is involved in absorption of food ____

Which part of the digestive canal is involved in chewing of food ____

Which part of the digestive canal is involved in:complete digestion of food ____

Label the following figure of the digestive system.

A part of human digestive system

Name any four life processes in living things.

Carbohydrates are bodybuilding nutrients.

Which of the organs perform the following functions in humans Absorption of water?

What is the name of tiny projections on the inner surface of small intestine which help in absorbing the digested food?


Define holozoic nutrition. Give one example

The process of digestion of food in humans begins in:
(a) stomach
(b) food pipe
(c) mouth
(d) small intestine

What is the dental formula of a normal human adult?

How is thorough chewing of food helpful in digestion?

Prepare a possible vegetarian menu for your dinner which would provide all the necessary nutrients.

List the enzymes and their action on food in the stomach and intestine.

Study the diagram given below and then answer the question that follows:

Give the total number of the type of tooth mentioned in '1' above, in the mouth of an adult and state its function.

Complete the following table by filling in the blanks 1 to 8.



Food acted upon

Find product





Mouth 4 5 Disaccharide





________ is the largest gland in the body.

Draw a well-labelled diagram of the ‘Liver’.

Give Scientific reasons:  
Consuming iodized salt in day to day diet is essential. 

Why is there a difference in the rate of breathing between aquatic organisms and terrestrial organisms? Explain.

Write four sequential steps of the procedure of the experiment "Preparing a temporary mount of a leaf peel to show stomata".

Name the following

The organ into which the pancreatic juice and the bile juice are poured

State whether the following statement is True or False.

The ducts from the salivary glands open into the duodenum.

Name the three regions of the large intestine.

Food are classified into three groups on the basis of the function they perform in our body. Name the three categories, and briefly give their functions. Also give their two sources each.

Fill in the blanks.

Grinding of food is brought about by _______ and ______

Fill in the blanks.

Pepsin acts on ________ to change them into _______ and __________.

Write true or false for the below statement. Rewrite the false statements correctly.

Water is absorbed in large intestine

Find the odd one out. Give reasons for your choice.

Give reasons for the following:

All teeth in the mouth are not alike.

Differentiate between

Small intestine and Large intestine

Define with examples: Carnivores

Define with examples: Omnivores

State whether the following statements are True or false: Enteropeptidase activates pepsinogen into pepsin.

Correct the spellings: Disegion

Fill in the blanks with the right word from those given below.

The process of digestion starts from the ............. . 

Fill in the blanks with the right word from those given below.

Pushing forward the food that has been chewed is the function of the ............. .

Who is telling a lie?

Tongue: My taste-buds can tell only a sweet taste.

Who is telling a lie?

Liver: I am the largest gland in the body.

Who is telling a lie?

Large intestine: I am 7.5 meter long.

Who is telling a lie?

Appendix: Digestion is impossible without me.

Who is telling a lie?

Lung: I play an important role in excretion.

Give reasons.

Food becomes acidic in the stomach.

Sketch and label a diagram of the digestive system and describe it in your own words.

What bodily needs or sensations do you become aware of even though you are reading a book?

Name the organs of the digestive system

How do we know that we are hungry and that we should now eat?

How do the salivary glands come to know that there is food in the mouth and it is time to secrete saliva?

What makes respiration and blood circulation go on all the time, and the processes of digestion happen at the right time?

Which systems work together to provide the body with energy?

What’s the solution?

A person has fainted and a crowd of people has surrounded him.

Why do we sometimes choke suddenly while eating?

Answer the following question.

Small Intestine is very long and coiled. Even if we jump and run, why it does not get twisted? What can happen if it gets twisted?

Write down the explanation.

Explain the structure of tooth.

Write down the explanation.

Explain why human dentition is considered as thecodont, diphydont and heterodont.

Observe the diagram. This is the histological structure of the stomach. Identify and comment on the significance of the layer marked by an arrow.

What is the length of the alimentary canal?

A group of organs together make up an ______ system.

The process by which the body removes waste is called ______.

List out the functions of the digestive system.

Why it is important to wear helmet while riding a bike?

Eating fast-food ad junk food affects our health. Justify.

Circle the odd one.

Breakdown of food into smaller molecules in our body is known as

The other name of food pipe is alimentary canal.


Enzymes: Digestive glands:: _______: Endocrine glands.

Write any two functions of digestive system.

Bile helps in the digestion of ______.

State whether true or false. If false, correct the statement.

During digestion, proteins are broken down into amino acids.

Describe the alimentary canal of man

Appendix is a vestigial organ in humans and functional in herbivorous animals for the digestion of ____________.

All are functions of the liver, EXCEPT

Which option represents the CORRECT sequence of digestive organs between the mouth and the anus?

(i)______ and (ii)______ form the common bile duct.

Identify which three of the following terminologies is true for human dentition.

A fluid containing the digestive enzyme ____________ is secreted by the serous cells of salivary gland.

In the given histology of the alimentary canal, identify i, ii, and iii.

All are functions of the liver, EXCEPT

A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains:

The exit of unabsorbed food material is regulated by ____________.

Identify the option that indicates the correct enzyme that is secreted in location A, B and C.

Liver produces for ______ the digestion of fat.

Liver transports nutrients, oxygen, wastes, and hormones.

Choose the odd one:

______ is a major organ for the digestion of food materials.

The digestive glands associated with the alimentary canal are ______.

List the parts of the digestive system.

List the glands associated with digestion.

Given below from (i) to (iv) are some food items.

  1. Boiled and mashed potato
  2. Glucose solution
  3. A slice of bread
  4. Mustard oil

Which of the above will give a blue-black colour when tested with iodine?

Read carefully the terms given below. Which of the following set is the correct combination of organs that do not carry out any digestive functions?

Cud is the name given to the food of ruminants which is

Choose the correct order of terms that describes the process of nutrition in ruminants.

The following statements describe the five steps in animal nutrition. Read each statement and give one word for each statement. Write the terms that describe each process.

Breaking of complex food substances into simpler and soluble substances.

Curdling of milk protein is done by ______.

______ is the vestigeal organ in human.

What is chyme?

What is a vermiform appendix?

What are the end products of digestion of starch, proteins, and fats respectively?

Rearrange the jumbled sequence of the different parts of the alimentary canal in proper sequence, (esophagus, small intestine, stomach, large intestine, anus, mouth, rectum)

What are different types of cells present in the crypts of Lieberkuhn?

In which layer of the wall of alimentary canal, secretary glands are present?

Given below are two columns, Column I shows enzymes secreted by the glands in the alimentary canal of human beings and Column II indicates the components of food on which enzymes act. Choose the options showing correct matching:


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