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3 marksTransport Systems

CSEC Biology · January 2005 · Paper 2 · Question 2(b)(iii)

Explain how oxygen from the air in the lungs moves to the rest of the body and into cells where it is needed.

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Other parts of this question

  1. 2(a)(i)Label the structures involved in breathing in Figure 2a above.[4 marks]
  2. 2(a)(ii)Add a line to Figure 2a to show the position of the diaphragm when breathing in.[1 mark]
  3. 2(a)(iii)State what is happening to the rib cage at the same time that the diaphragm is moving to the position you have shown in (a)(ii).[1 mark]
  4. 2(b)(i)Indicate with an 'X' on Figure 2a, where the structures shown in Figure 2b are found.[1 mark]
  5. 2(b)(ii)Name the TWO major blood vessels that branch to form the capillaries shown in Figure 2b.[2 marks]
  6. 2(c)(i)Why are breathing and respiration BOTH important to mammals?[3 marks]
  7. 2(c)(ii)Suggest ONE reason why plants do not need to breathe although respiration is important to them also.[2 marks]

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