- 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.