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3 marksThe Circulatory and Lymphatic Systems

CSEC Human and Social Biology · January 2012 · Paper 2 · Question 2(b)

Using the terms (Thin, Thick, Elastic, Inelastic, Absent, Present), complete Table 2 to compare three structural characteristics between arteries and veins.

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Other parts of this question

  1. 2(a)Name the anatomical structures indicated by letters A, B, and C in Figure 3.[3 marks]
  2. 2(c)(i)Referring to the right side of the heart in Figure 3, explain how it functions as a pump regarding the entry and exit of blood.[3 marks]
  3. 2(c)(ii)Identify the valve or structure preventing backflow between the chambers on the left side of the heart.[1 mark]
  4. 2(c)(iii)Name the action of the heart muscle that forces blood out under high pressure.[1 mark]
  5. 2(d)(i)Explain why having weakened muscular walls on the left side of the heart causes a patient to feel a lack of energy.[2 marks]
  6. 2(d)(ii)Describe the impact that chronic high blood pressure can have on the left side of the heart.[2 marks]

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