B3 2.3 Transport in the blood

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  • B3 2.3 Transport in the blood
    • White blood cells are part of the defence system of the body.
    • Your red blood cells carry oxygen from your lungs to the organs of your body.
    • Red blood cells are adapted to carry oxygen by being bioconcave, giving them a bigger surface area, by containing haemoglobin and by having no nucleus so more haemoglobin can fit in.
    • Your blood plasma transports dissolved food molecules, carbon dioxide and urea and has the blood cells suspended in it.
    • Platelets are cell fragments involved in the clotting of the blood.


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