Posts

GETTING ILL

Getting ill is ,some Or the other way, connected with firms and   diseases.Girms  come from the world around us. These tiny living things are found in the air, in soil, in water and sometimes in food. Germs  can make one ill if they get inside the body through openings, such as the mouth ,the nose Or a cut in the skin. They can cause diseases, such as folds and flu. Germs make you ill because they start living inside your body. Your body is made up of millions of tiny parts called cells. To live inside you, terms take your body's cells. This leaves your body feeling seeker. Germs also produce waste, and  when the waste gets into your system, it can make you very ill. But, don't worry ! Your body can often fight disease. When germs get inside you, white blood cells in your blood start to make antibodies. These are special chemicals that find germs and then stick to them. This helps other white blood cells in your blood locate the germs and  destroy them. Whe...
Post a Comment
Read more

EYES AND SIGHT

 How do eyes work? Eyes work by taking pictures of the objects  around us and sending them to the brain.Light from an object passes through the lens in the middle of the eye. This lens focuses the light onto the retina at the back of the eye. The retina changes light patterns into signals that it sends to the brain. The brain changes the signals into a picture to tell us that what our eyes are seeing. When we look at an object in front of us, each eye sees it from a slightly different angle. The brain combines the images from these two angles into a three dimensional image. Some curious heads may  ask that why need two eyes .  So the answer is_ We need two eyes because the help us see things properly. Each eye gives the brain a slightly different view of something, and the brain uses those little differences to work out exactly how far away the object is. Having depth perception helps us do things like catch a ball,shake hands or  pick up a pin. Did you know? :T...
1 comment
Read more