THE BLOOD

THE BLOOD

Immune response
1. Antigens are sites on the surface of cells allowing it to be recognised by WBC's
2. WBC's release antibodies
  1. antibodies work like enzymes ( Lock & Key)
  2. Causes problems with donor organs as WBC's may attack and slowly destroy it
Composition of Blood
1. Plasma
  1. Transports materials around the body
2. Platelets
  1. Clot blood
  2. Clotting Process
    1. Blood is exposed to air
      1. Platelets breakdown & fibrin is formed
        The fibrin forms a mesh which hardens forming a clot
3. White blood cells
  1. Used during Phagocytosis
  2. Process of Phagocytosis
    1. The WBC approaches the bacterium
      1. it then engulfes thr bacterium
        The DNA codes for digestive enzymes
        The enzymes are released and destroy the bacterium
4. Red blood cells
  1. carry oxygen
  2. biconcave cells containing no nucleus
  3. Contain haemoglobin

Resource summary

	Created by 9arush over 10 years ago