Hello, everybody here we are learning something very interesting which will tell about ourselves. That is the human body. Have you ever been to a big hospital in your neighbourhood? Such hospitals have a department which deals with taking photographs of the parts inside the human body. The X-ray department helps us to view the bones of our body. And there is a scan centre, which helps us to view the internal organs. These photos help us to find out if anything has gone wrong with the bones or the organs inside the body. What are such photographs are called as? They are nothing but X-rays. Organs that are inside our body are called as internal organs. This is the picture of internal organs. First is the head which comprises the brain. Then we will see the chest, which has lungs and the heart. Next is the abdomen, which carries the alimentary canal. That is the digestive system. The alimentary canal is made up of liver, pancreas and the intestines.

We have to move different parts of our body as we carry out various activities, such as playing, swimming or driving a vehicle. Many parts of our body such as eyes, arms, legs, ears help us in carrying out these activities. The working of all these parts must be in harmony for the different movements and the work of the body to go on smoothly. Harmony means orderly or pleasing arrangements of the parts. This harmony is known as the co-ordination in the working of different parts. Co-ordination is needed even in things which seem to be very simple such as drawing a picture or having a meal or drinking water. Observe the organs that would help you to pour out a glass of water and to drink the water from the glass. What would happen if there was no co-ordination between these organs? The water would spill.

Co-ordination is also needed between the working of the internal organs, like the beating of the heart or the circulation of the blood. Which organ brings about this co-ordination? It is the brain that maintains the co-ordination between different activities like speaking, jumping etc.