Circulatory system

    Cards (6)

    • Multicellular organisms require transport systems to supply their cells and remove waste products
    • In humans, one of the functions of the circulatory system is to transport substances
    • Transport systems

      • Made up of tubes or 'vessels' that carry materials from one part of the organism to another
      • Make close contact with cells, such as those of exchange surfaces
    • Substances transported in the blood

      • Oxygen
      • Carbon dioxide
      • Glucose
      • Urea
      • Antibodies
      • Hormones
    • Red blood cells

      Blood cells which contain the pigment haemoglobin responsible for the transport of oxygen
    • Blood plasma
      The liquid part of the blood containing useful things like glucose, amino acids, minerals, vitamins (nutrients) and hormones, as well as waste materials such as urea
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