Your blood transports oxygen and nutrients around the body to your cells, at the same time removing metabolic waste from the cells. An average adult has just under 5 litres of blood circulating around their body.
A brief look at the composition of blood will show why our blood is important.
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Blood is made up of:
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Professor James Isbister discusses the important role your blood plays in your body.
Prof. James Isbister (Runs 1:22)
Why Your Blood is Important
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