Advertisements
Advertisements
प्रश्न
What is the location and function of the villi?
Advertisements
उत्तर १
- 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.
उत्तर २
- 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
संबंधित प्रश्न
Digestion of starch starts in the stomach.
Name the biological catalysts which bring about chemical digestion of food.
The process of digestion of food in humans begins in ______.
| When a person puts food in his mouth, then teeth cut it into small pieces, chew 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 enter the stomach with food. The substance G protects the inside layer of stomach from the damaging effect of substance F whereas substance H is and enzyme for digestion. The partially digested food then enters into small intestine for further digestion. |
- What are (i) gland A, (ii) substance B, and (iii) enzyme C?
- Name the tube D.
- What is the movement E known as?
- What are (i) F, (ii) G, and (iii) H?
The stomach secretes gastric juice, which contains hydrochloric acid. What is its function?
Give any four reasons why water is necessary in our body.
Fill in the blanks in the table (1-5) by selecting the suitable names of substances from the list given below:
(steapsin, peptones, fatty acids, proteoses, protein).
| Digestive Enzymes | Acts on | To convert into |
| (i) Pepsin | _________(2) | ________(3) and |
| (ii) _______(1) | Fats |
________(4) _________(5) |
What do you mean by the absorption of food?
Give reasons for the following:
All teeth in the mouth are not alike.
State whether the following statements are True or false: Na+ is absorbed in intestine by sodium pump.
Describe the following: Coagulation of milk in the digestive system.
Mark odd one in the series:
Name the enzymes secreted by the following: Salivary glands
The question has four options. Choose the correct answer:
Common passage for swallowing food and breathing is
Which systems work together to provide the body with energy?
Identify which three of the following terminologies is true for human dentition.
Liver transports nutrients, oxygen, wastes, and hormones.
What are different types of cells present in the crypts of Lieberkuhn?
Write the chemical name and Molecular formula of tooth enamel.
