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- Words:
- 410
- Submitted:
- Tue Oct 20 2009
- Mark submitted by Author:
... Blood is a liquid tissue; it transports substances around the body and defends it against disease. The composition and functions of blood Composition of Blood: Red Blood Cells White Blood Cells Platelets Plasma which contains: Glucose Amino-acids Vitamins Hormones Mineral salts Antibodies Antitoxins Urea Phospholipids Lipoproteins Hydrogencarbonate ions Fibrinogen Blood is a liquid tissue. This means that it contains cells suspended in a liquid. Red blood cells carry oxygen and help to carry carbon dioxide. White blood cells are involved in the body's defense mechanisms. Platelets are fragments of cells; they help blood to clot.. The liquid is called plasma. It contains many important substances which must be carried around the body. There are about five million red blood cells in one cubic millimetre of blood, perhaps a bit more in boys and less in girls. If you are accessing this page from high altitude and you have lived up in the mountains for years, there will be many more red blood cells in your
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