1 markNutrition and the Digestive System

CSEC Human and Social Biology · January 2010 · Paper 2 · Question 4(d)

Suggest ONE sign or symptom which may result from a deficiency of iron.

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4(a)Name the blood vessels labelled A, B, and C in Figure 3.[3 marks]
4(b)Explain why humans need a circulatory system to transport oxygen, while single-celled organisms like amoeba do not.[2 marks]
4(c)Explain how an iron deficiency affects the transport of oxygen by red blood cells.[4 marks]

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