Advertisements
Advertisements
Question
What is the location and function of the villi?
Advertisements
Solution 1
- Villi expand the surface area of the intestine, facilitating the absorption of digested foods.
- Each villus contains a network of thin, tiny blood veins at its surface.
- The surface of the villus absorbs digested dietary molecules. Absorbed chemicals travel to various organs of the body via blood vessels.
Solution 2
- The finger like projections in the inner walls of the small intestine is called villi. These are found in small intestine.
- Function: The villi increase the surface area for absorption of the digested food.
APPEARS IN
RELATED QUESTIONS
What is the role of saliva in the digestion of food?
The largest gland in the human body is ______.
Which part of the digestive canal is involved in:
Absorption of food ______.
In which part of the digestive system is water absorbed?
| 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.
Complete the following table by filling in the blanks 1 to 8.
|
Organ |
Enzyme |
Food acted upon |
Find product |
|
1 |
Pepsin |
2 |
3 |
| Mouth | 4 | 5 | Disaccharide |
|
6 |
7 |
Maltose |
8 |
Study the following dental formula and then answer the question that follow:
`"i" 3/4 "c" 0/0 "pm" 0/1 "m" 1/1`
Name an animal possessing such a dentition.
What is the role of the liver and the pancreas respectively in the digestion of food?
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 ______
Write true or false for the below statement. Rewrite the false statements correctly.
The pancreas secretes bile juice
Name the enzymes secreted by the following: Pancreas
The question has four options. Choose the correct answer:
The number of teeth that grow only once in human is
Breakdown of food into smaller molecules in our body is known as
The other name of food pipe is alimentary canal.
Liver transports nutrients, oxygen, wastes, and hormones.
In which of the following vertebrate group/groups, the heart does not pump oxygenated blood to different parts of the body?
The enzymes present in the saliva convert ______.
Read the following passage carefully and answer the questions that follow it.
| Bile juice is stored in a sac called, gall bladder, located near its organ of secretion, liver. The gall bladder releases the bile juice into the small intestine whenever food reaches there. Though bile juice is devoid of any digestive enzymes, it is required for the digestion of fats. The fats cannot be digested easily because they are insoluble in water and are present as large globules. Bile juice breaks down big fat droplets into smaller droplets. These are then easily digested by the enzymes released from the pancreas. |
- Which organ secretes the bile juice?
- Why is digestion of fats difficult as compared to that of other nutrients?
- How does bile juice help in the digestion of fat?
- Where is the digestion of fat completed?
- Does bile juice digest fat completely?
