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 Gaseous Exchange Questions and Answers: Form 2 Biology

The diagram below illustrates a blood capillary surrounding a structure for gaseous exchange in human beings.
capillary1152020227.png
(a) Name the gaseous exchange structure
(b) Identify the gases labeled Y and Z.
(c) How does the gas labeled Y reach the inside of the blood capillary? (d) How does cigarette smoking lead to lung cancer?

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