Sit absolutely still. Observe the movements taking place in your body.

1.	Sit absolutely still. Observe the movements taking place in your body. You must K be blinking your eyes time to time. Observe the movements in your body as you I breathe. Write down the movements in your note book.We are able to move a few parts of our body easily in various directions and some, ft only in one direction. Why we are not able to move some parts at all directions?
Answer» We are able to bend or rotate our body in places where two parts of our body seem to be joined together – like elbow, shoulder or neck. These places are called joints. If ft our body has no joints, it would not be possible for us to move in any way at all. Bones cannot be bent. But we can bend our elbow. It is not one long bone from ft the upper arm to our wrist. It is different bones joined together at the elbow. Similarly, there are many bones present in each part of the body. We can bend or move our body only at those points where bones meet. There are different types of joints in our body to help us carry out different movements and activities. Let us see the function / movements of some of the joints in our body. Fixed joints which do not allow movement are called fixed joint. Gliding joints allow only a limited amount of movement of sliding nature of cartilage. For example, the joints of back bone. Hinge joint allows movement only in one plane. For example, fingers, knees. Elbow joint is composed of hinge joint. These joints allow movement in one plane and up to 180° only. Hence, we cannot move our elbows backwards. Piyotal joint allows movement in all planes, i.e. up and down, side and other planes. For example, head. Ball and socket joint allows movement in all directions. The rounded end of one bone fits into the cavity (hollow space) of other bone. Such a joint only allows movements in all directions. For example, joint between upper arm.

Sit absolutely still. Observe the movements taking place in your body. You must K be blinking your eyes time to time. Observe the movements in your body as you I breathe. Write down the movements in your note book.We are able to move a few parts of our body easily in various directions and some, ft only in one direction. Why we are not able to move some parts at all directions?

Answer»

We are able to bend or rotate our body in places where two parts of our body seem to be joined together – like elbow, shoulder or neck. These places are called joints. If ft our body has no joints, it would not be possible for us to move in any way at all.

Bones cannot be bent. But we can bend our elbow. It is not one long bone from ft the upper arm to our wrist. It is different bones joined together at the elbow. Similarly, there are many bones present in each part of the body.

We can bend or move our body only at those points where bones meet. There are different types of joints in our body to help us carry out different movements and activities. Let us see the function / movements of some of the joints in our body.

Fixed joints which do not allow movement are called fixed joint.

Gliding joints allow only a limited amount of movement of sliding nature of cartilage. For example, the joints of back bone.

Hinge joint allows movement only in one plane. For example, fingers, knees. Elbow joint is composed of hinge joint. These joints allow movement in one plane and up to 180° only. Hence, we cannot move our elbows backwards.

Piyotal joint allows movement in all planes, i.e. up and down, side and other planes. For example, head.

Ball and socket joint allows movement in all directions. The rounded end of one bone fits into the cavity (hollow space) of other bone. Such a joint only allows movements in all directions. For example, joint between upper arm.

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