DAV class 5 science - my body [fill in]

1. MY BODY

Our body works like a machine with the help of ………………………. present in it.

………………… are special structures present in our body that perform specific functions.

………………………………….. are some of the many organs present in our body.

Our body consists of ……………………..

…………………… is a group of organs that work together for a particular function.

For example that the mouth, the food pipe, the stomach and the intestines form ………………………….

Similarly, the nose, wind pipe and lungs help us in ……………………...

In this chapter, we shall study about ……………………………………………………. present in our body.

The Breathing System

All living things take in ………………. and give out …………………...

This process is called ……………………...

……………………………… takes place continuously, without any rest, in all living beings.

If this process stops for more than two minutes, the living being can ………………….

Which parts of your body are involved when you breathe?

Let us find out.

The air, that we breathe in, or inhale, enters our body through ……………………………..

The nose is connected to …………………………., inside the body, by a tube called …………………………….

The two balloon like structures are called …………………….

In the lungs, oxygen is taken up by ……………………….. and carbon dioxide is …………………….

This carbon dioxide is then driven out of the body, or ……………………………..

………………………………….., from the lungs, is circulated to all parts of our body.

Blood also collects ……………………….. from all parts of the body and brings it to …………………..

We, thus, understand that during the breathing process, ………………… is consumed by the body.

This helps different organs to get …………….. to perform ……………………………...

Also, carbon dioxide is driven out of the body as ………………………...

Our breathing system is always at work because ……………………………….

…………………………………………. help to keep our body and our breathing system healthy.

The Skeletal System

Skeletal system makes …………………… of the body.

It gives ……………………. to the body.

The skeletal framework also protects …………………………….

The skeleton of an adult human being is made up of ………………….. bones of different shapes and sizes.

…………………….. are hard and strong structures.

They are made up of …………………………….

Bones are ………………. entities.

They have channels that contain ………………………...

They also have …………………… that are necessary to keep them alive.

That is why we …………………..

The long bones, like ……………………….. are hollow from inside.

This hollow space is filled with cells and soft materials known as ………………………...

………………………… are manufactured inside this bone marrow.

…………………………….. is known as the factory for making blood cells.

Let us study about our skeletal system in some more detail.

The main parts of the skeletal system are:

1. ……………………….

2. …………………………

3. ………………………

4. …………………………

 

1. The Skull:

It is made up of ………………………...

They are ………………… together.

The skull is very important because ………………………………………….

There are two jaws—……………………………..

The ……………….. jaw is movable.

The movement of lower jaw helps us ……………………...

 

2. The Backbone:

The backbone is connected to ………………………..

It is made up of …………………. small bones called ………………….

These small bones, taken together make ………………………….

It protects …………………….

These small bones give ……………………. to our back.

(What would happen if our backbone was made of just one straight bone?)

 

3. The Rib-Cage:

There are ……………….. pairs of ribs, forming a cage, around delicate organs like the heart and the lungs.

These are curved bones joined to ………………………………..

The last two pairs of ribs are called ……………………….

This is because ………………………………………....

 

4. The Limbs:

The fore limbs, or the arms, are joined to the spine by …………………………………...

The upper arm has …………….. bone but the lower arm has ……………… bones.

The hand has …………….. bones in the palm and fingers.

……………………….., i.e. the legs, bear the weight of the whole body.

The upper part of the hind limbs is made up of …………………………….

This bone is called …………………….

The femur, or …………….., fits into the hip girdle.

The femur is connected to the lower two bones of the leg at …………………...

There are ……………………. bones in the ankle and toe region.

The Joints

Our bones do not simply work on their own.

Carefully observe a skeleton.

You will notice that at many different places, …………. bones are joined.

The bones are held together to form ………………….

The end of each bone is covered by ………………………………….

The cartilage-coated bone-ends are kept apart by ………………………. that works like the oil in a machine.

Coating of cartilage and the slippery fluid are important so that ………………………………..

The bones are held together by ………………………………...

Our body has several joints.

All joints show movement except ………………..

The bones of the skull are …………………….. and thus, show no movement.

Kinds of Joints

The joints allow movement of bones in different ways.

There are ………………….. types of joints present in our body which show different types of movement.

The four types of joints are …………………………………………………………...

Let us study about each one of them separately.

1. The Hinge Joint:

It works like the hinge of a door.

The bones, connected by this joint, move in ……………………….

…………………………… are hinge joints.

2. The Ball and Socket Joint:

In this joint, one bone which has ………………….., fits into …………………….. of another bone.

…………………………… are examples of this type of joint.

3. The Pivot Joint:

This type of joint is found between …………………………………...

Move your skull to find out the movement of this joint.

It moves ………………….. (when we signal ‘yes’), and ……………………. (when we signal ‘no’).

4. Gliding Joint:

This kind of joint is present in ……………………………………………...

………………………………. is because of this type of joint.

We are able to bend forward or backward, or sideways, owing to the presence of the gliding joint in the vertebrae.

Sense Organs

We know that human beings can smell, see, hear, taste and feel because of …………………………...

These sense organs (nose, eyes, ears, tongue and skin) collect …………………. and send it to ……………… for processing.

If any one of them is not working properly, we would not be able to either smell, see, hear, taste or feel, depending on the sense organ involved.

We now discuss these sense organs in some detail.

Eyes

Each eyeball is placed in ………………………...

They are protected by …………………………..

These also protect our eyes from ………………………….

The dark structure, in the front of the eyeball, is called ……………………..

The small round black spot, in its centre, is called …………………………..

………………………. allows light to enter the eye.

………………….., at the back of the eyeball, is the screen on which all images get formed.

The eye is connected to the brain by a nerve called ………………………….

Nose

There are …………………………… present in the nose which carry message about any chemical substance (odour/fragrance) that enters the nose.

This enables us to smell different substances.

Ears

Human ear is divided into three parts—…………………………………..

The portion of the ear, that is visible to us, is known as …………………………..

External ear may vary in ……………………………...

The outer ear directs …………………… to the inner ear.

The middle ear has ……………………… which convey the vibrations from the ear drum to the inner ear.

The inner ear helps us ……………………………………..

Tongue

We know that different parts of the tongue have ……………………. which are sensitive to four different tastes—…………………………………………...

Skin

………………………. forms a natural protective covering of the entire body.

It helps us ……………………………………………….

There are …………………………….. in the skin which help us to feel these sensations.

Sense Organs in Different Animals

Let us now discuss how different animals use different organs to sense different things.

Insects:

Insects, such as cockroach, housefly and butterfly have ……………………. on their bodies.

These insects ………………………. with the help of these feelers.

The housefly tastes with ………………………..

Water Animals:

Fish can feel the waves produced in water by other living animals.

They feel these waves through their ………………………….

This helps them ……………………………. or ……………………………….

Birds:

Birds have sense organs (eyes, ears, etc.) which enable them to see, to feel, to smell, to hear and to taste.

Besides these responses, birds also make different sounds …………………………………...

They make a typical sound when ………………………...

Similarly, they make a particular sound when ………………………………….

Birds also group together and make sounds for ………………………… or …………………………...

They fly in groups often making interesting shapes in the sky.

Reptiles:

Some reptiles, like snakes, have ………………………. which helps them to feel and smell.

A snake senses the availability of food through ………………………...

The snake feels different kinds of vibrations on the earth through ………………….

This helps it ………………………………………...

Mammals:

All mammals have sense organs, but some mammals have a special power either to smell, to hear or to see.

Dogs have a highly-developed sense of ……………………….

Bats have a special power ………………………………...

Due to this ability, bats can ………………………………………..

This is the reason why bats hunt …………………..

They detect their prey with the help of high pitched ‘sounds’ known as ……………………………...

 

 

Keywords

v  bone marrow : …………………………………..

v  cartilage :  ………………………………………….

v  exhalation :  …………………………………………….

v  inhalation :  …………………………………………….

v  joint : …………………………………………..

v  ligament :  ……………………………………………..

v  pupil :  ……………………………………………………..

v  ultrasonics :  ……………………………………….

v  vertebrae : ……………………………………………….