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4 marksThe Circulatory and Lymphatic Systems

CSEC Human and Social Biology · January 2008 · Paper 2 · Question 3(b)(i)

Thomas cuts a blood vessel in a vehicle accident.

Explain the mechanism by which his body acts to stop bleeding.

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Other parts of this question

  1. 3(a)(i)State the name of the liquid component of blood.[1 mark]
  2. 3(a)(ii)Name the oxygen-carrying pigment found in human blood.[1 mark]
  3. 3(a)(iii)Name the type of blood cells responsible for fighting infection.[1 mark]
  4. 3(b)(ii)Explain how the body prevents infection of the open wounds.[3 marks]

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