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4 marksTransport Systems

CSEC Biology · January 2019 · Paper 2 · Question 4(a)(ii)

The structure of arteries and veins differ from each other. Explain how TWO of these differences allow these blood vessels to carry out their functions.

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Other parts of this question

  1. 4(a)(i)With the aid of a labelled diagram, describe how the mammalian heart pumps deoxygenated blood from the cells in the body to the lungs to become oxygenated.[6 marks]
  2. 4(b)(i)State ONE similarity and ONE difference between the structure of a blood capillary and the structure of a xylem vessel found in the stem of a green plant.[3 marks]
  3. 4(b)(ii)Suggest TWO reasons why green plants do not need to depend on xylem for transporting oxygen to their cells.[2 marks]

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