the circulatory system

HideShow resource information
  • Created by: Sc1602
  • Created on: 22-03-18 18:43
View mindmap
  • circulatory system
    • blood
      • red blood cells
        • carry oxygen
          • bi-concave disc for LSA
          • no nucleus for more space
          • haemoglo-bin (red pigment) binds to oxygen
            • forms oxyhaemo--globin which is broken down in body cells to obtain oxygen
      • white blood cells
        • defend against pathogens
          • engulf
          • antibodies
          • antitoxins
      • platelets
        • help blood clot at wounds
        • cell fragments
      • plasma
        • carries: urea, blood cells, hormones, CO2, amino acids, glucose
    • the heart and lungs
      • upper-atriums
      • lower- ventricles
      • coronary arteries deliver oxygenate--d blood
    • blood vessels
      • arteries
        • narrow lumen
          • keep blood at high pressure
        • thick muscle and elastic fibres
          • withstand high pressures
      • veins
        • low pressure
          • thin muscle and elastic fibres
          • wide lumen
          • valves
            • keep blood flowing in right direction
      • capillaries
        • no elastic fibres or smooth muscle
        • one cell thick
          • gas exchange
            • short diffusion distances
            • deliver maxiumum oxygen and glucose to cells

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Circulation resources »