MediHealth
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Gastrointestinal system
Updated: Nov 17, 2009 - 13:18Your gastrointestinal system is your stomach, large intestine and small intestine. `Gastro' means stomach, so gastro + intestinal = stomach and intestines. Your gastrointestinal system processes the food that you eat, taking nutrients from it, and then getting rid of the waste that your body does...
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Gastrointestinal tract
Updated: Nov 17, 2009 - 13:18Your gastrointestinal tract (also called your GI tract for short)is basically a long muscular tube that gets the energy out of the food you eat - a process called digestion. It begins at your mouth and goes through your oesophagus, gastrointestinal system and rectum to end at your anus. ...
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Gene
Updated: Nov 17, 2009 - 13:18Genes are information passed on by your Mum and Dad, and carried by your DNA on your chromosomes. There are over 30,000 genes on each chromosome, so many that we cannot see them all. Genes decide everything about you and how your body works - what colour your hair is, how the muscles move when yo...
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Germ
Updated: Nov 17, 2009 - 13:18A germ is a foreign invader that can make you sick. Different types of germ cause infections, including viruses and bacteria. Did you know? You transfer more germs to someone by shaking hands with them than by kissing them. ...
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German measles
Updated: Dec 22, 2009 - 11:59German measles, also called rubella, is an infection. It is very contagious - this means you can catch it very easily. It is called German measles because it was first discovered by German doctors about 250 years ago! In the past, lots of kids used to get German measles, but since the Measles...
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Gland
Updated: Nov 17, 2009 - 13:18Glands are groups of cells that make and release hormones. There are many glands all over your body, and they do things like make sure you are not too hot or too cold. They also keep your appetite in check, so that you eat the right amount. Each gland does a different job, but they all work toget...
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Glaucoma
Updated: Nov 17, 2009 - 13:18Glaucoma is damage to your optic nerve at the point where it leaves your eye. This type of damage affects your sight, and in kids it is usually caused by raised pressure in your eye. The raised pressure can be caused by other problems affecting your eye, like inflammation, and this is called...
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Glial cell
Updated: Dec 04, 2009 - 10:08Glial cells are a type of brain cell. They are just as important as neurons, because they help them to do their jobs. They are the 'support cells' that bring nutrients to the neurons. They also hold them in place, protect them and clear away rubbish. Your brain has about 10 times more glial cells...
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Glioma
Updated: Nov 17, 2009 - 13:18A glioma is a type of brain tumour that starts in glial cells. If you have a brain tumour, it is most likely to be a glioma. There are two main types of glioma - astrocytomas and ependymomas. ...
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Glucagon
Updated: Nov 17, 2009 - 13:18Glucagon is a hormone that controls the amount of glucose in your blood. It is produced by your pancreas between meals. Glucagon tells your liver and muscle cells to release stored glucose to make sure you have the right levels of it in your blood. Glucagon has the opposite effect to insulin, bec...
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