How Many Litres Of Blood Does Our Body Contains?
In an adult human body there are about 5.5 litres of blood. These litres form the most amazing transportation system imaginable. The blood circulates through the body so that it reaches every one of the billions of cells that make up the body tissues. It brings food and oxygen to each cell, carries away waste products, carries hormones and other chemical substances, helps the body fight infection, and helps regulate body heat. The blood is made up largely of colourless liquid called “plasma”, and it is the red corpuscles floating in this liquid that give blood its red colour. It is when we consider how many of these blood cells there are in the ten pints of blood that our imagination is staggered. There are about 25 billion of them! In a single drop of blood there are some 300,000,000 red corpuscles. If the cells were joined together in a chain, keeping their actual size, the chain would go four times around the earth. Even though the cells are tiny, they have a tremendous surface area
