Subject – Science 2. Nutrition in Animals

DIGESTION IN HUMAN We take in food through the mouth, digest and utilise it. The unused parts

of the food are defecated. Have you ever wondered what happens to the

food inside the body?

Alimentary Canal The food passes through a continuous canal which begins at the

buccal cavity and ends at the anus. The canal can be divided into

various compartments:

(1) the buccal cavity,

(2) foodpipe or oesophagus,

(3) stomach,

(4) small intestine,

(5) large intestine ending in the rectum and

(6) the anus.

Is it not a very long path? These parts together form the

alimentary canal (digestive tract)

Digestive juices and Digestive system The inner walls of the stomach and the small intestine, and the

various glands associated with the canal such as salivary glands, the

liver and the pancreas secrete digestive juices. The digestive juices

convert substances of food into simpler ones.

The complex digestive tract and the associated glands together

constitute the digestive system.

Now, let us know what happens to the food in different parts of the digestive tract.

The mouth and buccal cavity Food is taken into the body through the mouth. The

process of taking food into the body is called ingestion. We

chew the food with the teeth

and break it down mechanically

into small pieces.

Each tooth is rooted in a separate

Socket in the gums.

Our teeth vary in appearance

and perform Different functions.

Accordingly they are

Given different names

Our mouth has the salivary glands which secrete saliva.

The saliva breaks down the starch into sugars

The tongue is a fleshy muscular organ attached at the back

to the floor of the buccal cavity.

It is free at the front and can be moved in all

directions.

it mixes saliva with the food during chewing and helps

in swallowing food.

We also taste food with our tongue.

It has taste buds that detect different tastes of

food.

Exercise

1.Explain Alimentary canal and name all the compartments.

Alimentary Canal The food passes through a continuous canal which begins at the

buccal cavity and ends at the anus. The canal can be divided into

various compartments:

(1) the buccal cavity,

(2) foodpipe or oesophagus,

(3) stomach,

(4) small intestine,

(5) large intestine ending in the rectum and

(6) the anus.

Is it not a very long path? These parts together form the

alimentary canal (digestive tract)

2. What do you mean by digestive system? The inner walls of the stomach and the small intestine, and the

various glands associated with the canal such as salivary glands, the

liver and the pancreas secrete digestive juices. The digestive juices

convert substances of food into simpler ones.

The complex digestive tract and the associated glands together constitute the

digestive system.

3. What is Ingestion?

Food is taken into the body through the mouth. The process of taking

food into the body is called ingestion.

4.What are the different types of teeth and their function?

5. Explain the role of saliva.

The saliva breaks down the starch into sugars.

6.What are the different function of tounge ? Draw a tounge and

show different region for different taste.

The tongue is a fleshy muscular organ attached at the back

to the floor of the buccal cavity.

It is free at the front and can be moved in all

directions.

it mixes saliva with the food during chewing and helps

in swallowing food.

We also taste food with our tongue.

It has taste buds that detect different tastes of

food.

7. Draw Digestive system in human body.

Subject – Mathematics

Integers

Remaining Question of Ex. – 1.3

DIVISION OF INTEGERS

a) (-20) b) (-9) c) (-15) d) (-16)

a) (-5) b) (-16) c) (-4)

a) 9 b) 67 c) 25

Solutions

English

History

1.

2. The features of 700 A.D. were:

By 700 A.D. regions already possessed distinct geographical

dimensions.

They had their own language and cultural characteristics.

They were also associated with specific ruling dynasties.

There was considerable conflict between these states.

Exercise A

Exercise B

Occasionally dynasties like the Cholas, Khiljis, Tughluqs and

Mughals were able to build an empire that was pan-regional,

covering various regions. These empires were not equally stable

or successful.

Hindi

1.

aa

2

4

3