Our body is a wonderful machine. It has more parts and can do more types of work than any machine in the world. That is why we say that man is the supreme living thing in this world.
Well, now let's have a look at our body systems. I'm going to go through them quickly and then we will have a look at them in detail.
Our bodies are made up of several parts: the head, neck, trunk, arms and legs. These parts are held together by a framework called the skeleton. The skeleton is made up of bones and it gives the body its shape and form. Bones not only support our bodies but also help to protect important organs. The skull protects the brain. The ribs protect the lungs and heart. The hips protect part of the food canal. The spine protects the spinal cord. There are different types of bones in our bodies. The main support of the body is the backbone or spine. It is made up of a long row of small bones joined to one another. It is found only in the neck and trunk.
The bones of our body are hard, white and strong. When a bone breaks, new cells begin to grow at the broken ends. More and more new cells are formed until finally the broken ends meet and join together.
To find out if a bone is broken, the doctor uses an X-ray machine. This machine can photograph the inside of the body. The photographs it takes are called X-ray photographs. The ribs can be seen clearly from it.
There are more than 600 muscles in your body. They make up the flesh that lies between the skin and the skeleton. Muscles can contract and relax. Their contraction and relaxation cause body movements. They also push food through the body and make the blood circulate.
Now let's see the nervous system. It is made up of three parts: the brain, the spinal cord and the nerves. All parts of the body are connected to the brain by nerves. Nerves act like telegraph wires. They carry messages from the different parts of the body to the brain. Then the brain decides on what to do and it sends messages back to the appropriate parts of the body. This system controls all muscle movement and also controls your senses. So the nervous system is very important because without it we will not be able to feel, smell, taste, hear or see. The brain is the most important part of the nervous system. It controls the movements of the body and sends out instructions to all parts of the body.