Blood

    Cards (7)

    • Blood plasma
      The liquid part of the blood
    • Functions of blood plasma
      1. Transports dissolved substances around the body
      2. Transports soluble digestion products from small intestine to other organs
      3. Transports carbon dioxide from body cells to lungs to be breathed out
      4. Transports waste product urea from liver to kidneys to be excreted
    • Red blood cells
      • Contain the oxygen-carrying molecule hemoglobin
      • Have no nucleus, allowing more space for hemoglobin
      • Have a biconcave disk shape, giving greater surface area for oxygen diffusion
    • Function of red blood cells
      Transport oxygen from lungs to body cells
    • White blood cells
      • Contain a nucleus with DNA encoding instructions for immune system functions
    • Function of white blood cells
      Part of the immune system, e.g. making antibodies
    • Platelets
      Tiny fragments of cells that help the blood to clot
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