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6 marksTransport Systems

CSEC Biology · January 2019 · Paper 2 · Question 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.

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Other parts of this question

  1. 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.[4 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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