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
What is the role of saliva in the digestion of food?
Digestion of starch starts in the stomach.
Which of the following has the longest small intestine?
(a) carnivore
(b) omnivore
(c) herbivore
(d) autotroph
The process of digestion in humans is completed in:
(a) oesophagus
(b) small intestine
(c) stomach
(d) large intestine
In human digestive system, the enzymes pepsin and trypsin are secreted respectively by:
(a) pancreas and liver
(b) stomach and salivary glands
(c) pancreas and gall bladder
(d) stomach and pancreas
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.
(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) H?
Which one of the following pairs of types of teeth perform one common function as stated against it?
How is thorough chewing of food helpful in digestion?
Draw a diagram of the human alimentary canal and label - gall bladder, pancreas, liver, and small intestine on it.
Give two reasons to explain why the absorption of digested food occurs mainly in the small intestine.
Define the following term:
assimilation
Fill in the blanks.
______ and ______ help in digestion but food does not pass through them.
Write true or false for the below statement. Rewrite the false statements correctly.
Absorption of food takes place in small intestine
Define with examples: Carnivores
State one difference in nutrition: Holophylic and Holozoic
Describe the digestion of food in small intestine.
The question has four options. Choose the correct answer:
The organ that stores bile is
Write down the explanation.
Explain the structure of tooth.
A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains:
