Diagram shows the transport of respiratory gases in the human body. a. i) Name the structures labelled P and Q. [2 marks]
P:_
Q:_
ii) State two important characteristics of Q that enables the process of gaseous exchange to occur effectively between Q and the blood capillaries. [2 marks]
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b) Explain how P accepts oxygen from Q and transfers it to the body cells. [2 marks ]
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c) If an individual inhalers a lot carbon monoxide, what is the effect on the transport of oxygen by P? Explain. [3 marks ]
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