Blood

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  • Created by: Bethhy
  • Created on: 15-04-14 15:10
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  • Blood
    • components
      • plasma
        • main component of blood
        • largely made of water
        • contains dissolvable substances.
          • fibrinogen
      • Erthrocytes
        • biconcave disks
        • contains haemoglobin
          • red pigment
          • carries oxygen
        • made in bone marrow
          • short bones
        • 120 day life span
      • leuthrocytes
        • change shape
        • colourless cytoplasm
        • defends against infections
        • all are nucleus containing
      • platelets
        • fragments of Megakaryocytes
        • found in bone marrow
          • fragments of Megakaryocytes
        • involved in blood clotting
    • functions
      • Leuthrocytes
        • some produce antibodies
          • against antitoxins and pathogens
        • others engulf and digest
          • Phagocytosis
      • platelets
        • seals blood vessels
        • stops major blood loss
        • stops pathogens getting in broken skin.
      • Plasma
        • transports food from storage to use
          • glucose and amino acids to  small intestine
        • maintains body temperature
        • buffer to change pH
      • Erthrocytes
        • Carry oxygen
        • large surface to volume ratio
        • allows quick diffusion

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