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The gastric juice contains hydrochloric acid, It kills the microbes that enters in to the stomach through Food and water.

Absorption :

Transport of the products of digestion from the walls of the intestine into blood is called absorption.

The length of small intestine in human being is 6.5 m

Pepsin and Trypsin are the enzymes that act on proteins. Both these enzymes convert proteins to peptones.

1. Villi: These are finger-like projections formed from the intestinal wall. The digested food material ¡s absorbed by villi. They increase the area of absorption. 
2. Bile Juice: Digestive juice secreted by the liver. Enzymes are absent in it. It helps in the breakdown of fat molecules by a process called emulsification.
3. Lipase: An enzyme that converts fats to fatty acids and glycerol. It is present in the pancreatic juice.
4. Fat: It is made up of fatty acids and glycerol. It will be used for the production of energy.
5. Liver: The largest gland in the body. It produces bile juice.
6. Emulsification: Conversion of fats into small globule like forms with the help of the bile juice is called emulsification
7. Kwashiorkor: It is a disease due to protein deficiency

Ptyalin (salivary amylase), amylase and sucrose are the enzymes that act on carbohydrates.

1. Amylase: An enzyme that hydrolyzes starch or glycogen to sugars.
2. Palm: The other name for salivary amylase. 
3. Penh: It is an enzyme produced by gastric glands in the stomach that helps to digest proteins in the food.
4. Chyme: It is the partially digested food in the stomach. Proteins and carbohydrates are broken down to some extent.
5. Sphincter: Ring like muscles present at the end of the stomach and allows a small amount of food into the small intestine.
6. Digestion: The process of breaking down complex substances into simple substances SO₂ that can be used by the body with the help of enzymes is called digestion.
7. Pancreas: It is a mixed gland. It secretes pancreatic juice which contains enzymes like trypsin and amylase. This gland lies between the spleen and duodenum.
8. Enzymes: These are a group of chemical substances which cause biochemical reactions. Helps in the conversion of complex food materials into simple substances.

(D) Bile juice

Answer is (D) All

Answer is (A) i only

1. The sphincter muscle is responsible for regulating the openings of the stomach into small intestine.

2. So that only small quantities of the food material may be passed into the small intestine from the stomach at a time.

The gastric juice secreted by the walls of stomach contains Hydrochloric acid, protein digesting enzyme, pepsin and mucus.

Nutrition in amoeba is holozoic. Thus, solid food particles are ingested which are then acted upon by enzymes and digested. It is an omnivore, feeding on both plants and animals. Its diet includes bacteria, microscopic plants like the diatoms, minute algae, microscopic animals like other protozoa, nematodes and even dead organic matter.

Since it is a unicellular organism, amoeba does not have any specialised structure or organ for the process of nutrition. It takes place through the general body surface with the help of pseudopodia.

(B) Diabetes

(A) No vision in dim light

C) 1, 2 both are correct

Answer is (A) xylem

Example for parastic plant is Cuscuta

Answer is (D) All

1. Chlorophyll and other pigment molecules trap (harvest) solar energy, convert it into chemical energy in the thylakoid membranes of the chloroplast. 

2. But animals having green colour on their body cannot trap solar energy and cannot perform photosynthesis. Photosynthesis is possible only in plants but not in animals.

C) Gastric juice – Lipase

C) Gastric juice – Lipase

(D) Bile juice

Correct option is A) Bile

1. Why do the people suffer from indigestion problems? 

2. Why do we get vomitings? 

3. Why do we get belching? 

4. Why do we get ulcers in stomach? 5. What is acidity?

B) Hydrochloric Acid

(B) Calciferol

Water soluble vitamins : Riboflavin (B₂), Thiamin (B₁) 

Fat soluble vitamins : Retinol (A), Tocoferol (E)

(C) dark reaction

Seldom: Rarely, not often.

Constipation: The condition of being unable to get rid of waste materials from bowels easily.

Obesity: This condition occurs due to overeating and excess energy intake.

(A) Haustoria

C) Convolvulaceae

(A) Mushroom

(C) Fasciola hepatrica

1. Bile juice and lipase enzymes helps in fat digestion. 

2. Bile juice is secreted by liver. 

3. Fats are digested by converting them into small globules like forms by the help of the bile juice. 

4. This process is called emulsification. 

5. Lipase enzyme is secreted by pancreas. 

6. It converts emulsified fats into fatty acids and glycerol. 

7. Fats \(\overset{Bile}{\longrightarrow}\) small globules ( Emulsification )

    Emulsified fats \(\overset{Lipase}{\longrightarrow}\) fatty acids and small intestine.

8. This process takes place in duodenum and small intestine.

Peristaltic movement:

The muscles present in the wall of oesophagus rhythmically contracts and relaxes. This produces an wave like movement known as a peristaltic movement.

Emulsification : Fats are digested by converting them into small globule like forms by the help of bile juice secreted from liver. This process is known as emulsification

Peptidases and sucrases are the enzymes presentin the intestinal juice. Peptidases converts peptides to amino acids. Sucrase converts sucrose (cane sugar) into glucose.

The enzymes present in intestinal juice finally convert the protein to amino acids, complex carbohydrates into glucose and fats into fatty acids and glycerol

1. Which part of the small intestine secrete intestinal juice? 

2. Intestinal juice contains which enzymes? 

3. Intestinal juice converts peptids into?

4. Sucrose present in intestinal juice converts sucrose to? 

5. Digestion of which nutrient resumes in small intestine? 

6. Which digestive juice involved in the complete digestion of food?

1. What is malnutrition? 

2. What are the causes for malnutrition? 

3. What are the different types in malnutrition

4. How can we overcome the malnutrition? 

5. What are the reasons for malnutrition in our country?

1. Where is pancreas located? 

2. Why pancreas is called as mixed gland? 

3. What are the hormones released by the pancreas?

4. What are the enzymes released by the pancreas? 

5. What are the disorders occur if pancreas does not work properly?6. What is the role of pancreas in digestion?

The mode of nutrition in which two organisms live together and are mutually benefited is called mutual-ism or Symbiosis.