Human body is a wonderful machine. It performs several functions without rest form the birth. The main organs of the human body are lungs, heart, kidney, liver and brain.

Each system carries out a major function. The brain gives us intelligence to use our physical and mental abilities. The skin covers the human body. Skin is a flexible covering which protects the body. The body’s strong internal framework called skeleton and skin, there are about 500 muscles. Never spread from the brain to all part of the body. They carry signals in the form of tinny electrical impulse, the sense organs namely eyes, nose, tongue and skin pass the message to brain automatically which controls breathing, heart beat, digestion etc. the body keeps on growing. The peak of physical growth is reached at about 18 to 25 years of age. When we grow old the skin becomes wrinkled and less elastic. The joint become inflexible muscles, loose and bones weak.

At the climax of life the body gives up and death occuses. Human body is a most valuable gift of god. A healthy body contains a healthy brain and healthy soul. As such it is very important to take care of our body. For this regular exercise, control over eating habits, cleanliness of body and discipline of life style are essential in daily life.

The development of science has made our lives easier and happier. But at the same time it has affected our lives adversely. Science has gifted us with some wonderful industrial machines. Today, industries use the latest technology for production. Computer are used in every filed. They operate faster and are more accurate than a human being. But then many workers have become unemployed. Electrical appliances like the mixer, the washing machine, the vacuum cleaner, etc. have made the work of a housewife easier and faster. Satellites and the TV have brought the whole world into our living rooms. But people become addicted to TV and the youth learn wrong values. Science has been a great blessing in the field of medicine. Many diseases can now be controlled, prevented and even eradicated. This has increased the life span of man. But on the other hand, inventions such as atom bombs, nuclear bombs and other destructive weapons have increased the chances of total destruction of humanity. Vehicles have, no doubt, made transport easy, but have also led to noise and air pollution. Insecticides and fertilizers benefit the crops, but destroy the soil fertility. If science is used constructively, it is a blessing. But if misused, it could be a curse.

The Earth is a planet. It travels with eight other planets around the sun. The Sun, the nine planets and their moons make the Sun family. It is called the Solar System. The Sun is a star. The Sun and its planets are part of huge cluster of the galaxy, called the Milky Way. There are more than one hundred billion stars in the Milky Way. And among them< the sun is just one star, neither the biggest, nor the brightest. Scientists think that there are about one hundred billion other galaxies, each one containing hundreds of thousand of million of star!