Red blood cells - These cells transport oxygen from the lungs to the organs. They have no nucleus. They are packed with a red pigment called haemoglobin., Plasma - This liquid transports carbon dioxide from the organs to the lungs, soluble products of digestion from the small intestine to other organs, and urea from the liver to the kidneys., Platelets - These are small fragments of cells. They help blood to clot at the site of a wound., White blood cells - These cells form part of the body’s defence system against microorganisms. There are many different types.,

Components of the blood

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