Why is blood red?

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A Because it is meant to be red
B Because red blood cells are packed with a red-coloured substance called haemoglobin
C Because its cells are dead
D none of the above

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Answer: B. Because red blood cells are packed with a red-coloured substance called haemoglobin

Red blood cells contain haemoglobin, a red pigment that carries oxygen. This gives blood its red colour.

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Why is blood red?

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