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Red blood cells (RBC) are the type of blood cells whose function is to carry oxygen from the gaseous-exchange surfaces around the body so that it is available to all the cells for respiration.
The red blood cells are specialised for their function in various ways.
They contain haemoglobin, which is the pigment which carries the oxygen, and they have no nucleus.
This gives them a biconcave shape with a large surface area which allows more efficient diffusion.
Anne Evans
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