Solution 5: Villi are small finger-like projections found inside the inner walls of the small intestine. They v increase the surface area for absorption of the digested food. Each villus has a network of thin and small blood vessels close to its surface. The surface of the villi absorbs the digested food materials.
What is villi and its function?
Villi are specialized for absorption in the small intestine as they have a thin wall, one cell thick, which enables a shorter diffusion path. They have a large surface area so there will be more efficient absorption of fatty acids and glycerol into the blood stream.
Where are villi located what is their function?
Villi are small finger-like projections located in the walls of the small intestine. Their function is to increase the surface area in order to maximise the absorption of digested food. Villi numbers vary between 10 to 40 per square metre of tissue and are typically 0.5 to 1 mm long.
What are villi what is their location and function Class 7 Ncert?
Villi are small finger-like outgrowths present that help in the process of absorption. These are located in the inner walls of the small intestine. Its function is to increase the surface area of the small intestinal wall to absorb the digested food..
What are villi very short answer?
Solution 5: Villi are small finger-like projections found inside the inner walls of the small intestine. They v increase the surface area for absorption of the digested food. Each villus has a network of thin and small blood vessels close to its surface. The surface of the villi absorbs the digested food materials.
What is the importance of villi?
The structure of the small intestine is designed for absorption of nutrients. The inside of the small intestine is lined with villi that absorb nutrients from the liquid mixture called chyme produced in the stomach from the food we eat.
What will happen if villi are absent in a person?
If you don’t have functioning intestinal villi, you can become malnourished or even starve, regardless of how much food you eat, because your body simply isn’t able to absorb and make use of that food.
What is the role of villi class 10?
The tiny projections on the inner surface of the small intestine which help in absorbing the digested food are called villi. These helps to increase the surface area of intestinal walls.
What do you mean by Lacteal?
Lacteal, one of the lymphatic vessels that serve the small intestine and, after a meal, become white from the minute fat globules that their lymph contains (see chyle). … The lacteal capillaries empty into lacteals in the submucosa, the connective tissue directly beneath the mucous membrane.
What is the function of villi for Class 7?
The villi increase the surface area for absorption of the digested food. Each villus has a network of thin and small blood vessels close to its surface. The surface of the villi absorbs the digested food materials.
What are villi answer Class 7?
The inner walls of the small intestine have thousands of finger like projections. These are called villi. They increase the surface area of absorption of digested food.
What are ruminant animals Class 7?
NCERT CBSE 7 Biology. Ruminants are mammals that are able to acquire nutrients from plant-based food by fermenting it in a specialized stomach prior to digestion, principally through microbial actions. The process typically requires the fermented ingesta (known as cud) to be regurgitated and chewed again.
What do you mean by Egestion Class 7?
Egestion. The process of consumption of food into body is called ingestion. The process of elimination of undigested food out of the body is called egestion.
What are the 5 steps involved in digestion?
Figure 2: The digestive processes are ingestion, propulsion, mechanical digestion, chemical digestion, absorption, and defecation. Some chemical digestion occurs in the mouth.
What is the main function of villi Brainpop?
Their main function is to absorb nutrients into the bloodstream. This might happen if your large intestine did not absorb water from chyme.
What disease causes damage to the villi?
Celiac disease damages the villi, leaving your body unable to absorb nutrients necessary for health and growth. Celiac disease, sometimes called celiac sprue or gluten-sensitive enteropathy, is an immune reaction to eating gluten, a protein found in wheat, barley and rye.