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Sunday, April 12, 2009

FUNCTIONS OF BLOOD

Functions of Blood:

You take a last, deep, calming breath before plunging into a
dark, vessel-like tube. The water transports you down the slide
much like the way blood carries substances to all parts of your
body. Blood has four important functions.
1. Blood carries oxygen from your lungs to all your body cells. Carbon dioxide diffuses from your body cells into your blood. Your blood carries carbon dioxide to your lungs to be exhaled.
2. Blood carries waste products from your cells to your kidneys to be removed.
3. Blood transports nutrients and other substances to your body cells.
4. Cells and molecules in blood fight infections and help
heal wounds.
Anything that disrupts or changes these functions affects all the
tissues of your body. Can you understand why blood is sometimes
called the tissue of life?

Parts of Blood:
Blood is a tissue made of plasma (PLAZ muh), platelets (PLAYT luts), and red and white blood cells. Blood makes up about eight percent of your body’s total mass. If
you weigh 45 kg, you have about 3.6 kg of blood moving through your body. The amount of blood in an adult would fill five 1-L bottles.

Types of Blood:







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