Q1) what are villi? What is their location and function?
Q2) Draw various stages in life history of silk moth?
Q3) Define photosynthesis? Write the equation of photosynthesis? What
are the factors essential for the photosynthesis to take place? Q1) which part of the digestive canal is involved in:
I) Absorption of food ------------III) Killing of bacteria -----------
IV) Complete digestion of food ---------
V) Formation of faecesII) Chewing of food. please answer l will mark brainlest if you give me write answer
Answers
Explanation:
1]The small intestine has millions of tiny finger-like projections called villi. These villi increase the surface area for more efficient food absorption.
Within these villi, are present numerous blood vessels which absorb the digested food and carry it to the blood stream. It is hence from the blood stream, the absorbed food is delivered to each and every cell of the body.
2]PLEASE REFER THE IMAGE.
3](a) The process by which green plants make their own food (like glucose) from carbon dioxide and water by using sunlight energy in the presence of chlorophyll is called photosynthesis. (c) The process of photosynthesis takes place in the green leaves of a plant. The carbon dioxide gas required for making food is taken by the plant leaves from the air which enters the leaves through tiny pores called stomata. Water required for making food is taken from the soil which is transported to the leaves from the soil through the roots and the stem. The sunlight provides energy required to carry out the chemical reactions involved in the preparation of food. The green pigment called chlorophyll absorbs sunlight energy. The photosynthesis takes place in three steps: (i) Absorption of sunlight energy by chlorophyll. (ii) Conversion of light energy into chemical energy and splitting of water into hydrogen and oxygen by light energy. (iii) Reduction of carbon dioxide by hydrogen to form carbohydrates like glucose by utilising the chemical energy. .
4]
absorption of food small intestine.
(ii) chewing of food buccal cavity (Mouth).
(iii) killing of bacteria stomach.
(iv) complete digestion of food small intestine.
(v) formation of faeces large intestine.
Answer:
Explanation:
Q.1.Villi are small finger-like projections found inside the inner walls of the small intestine. They 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.