1) Why red blood cells have elastic plasma membranes?  a) Can squeeze into narrow blood capillaries b) Can transport oxygen in the form of oxyhaemoglobin c) Can Transport carbon dioxide 2) What is the function of white blood cells? a) Transport oxygen in the form of oxyhaemoglobin b) Fight infections by destroying bacteria through phagocytosis c) Help blood to clot 3) What is the effect of shortage of platelets? a) Difficulty in blood cloting  b) Weak body defence   c) Anaemia  4) Why red blood cells have no nucleus? a) Help blood to clot b) Destroy bacteria through phagocytosis c) So red blood cells have more space to fill in haemoglobin 5) What is the scientific name of white blood cell? a) Thrombocytes b) Erythrocytes c) Leucocytes

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