(a) Name the enzyme present in saliva. Why is it important?
(b) What is emulsification?
(c) Name the substance that is oxidised in the body during respiration.
(d) Why are lungs divided into very small sac-like structures?
(e) Explain the function of haemoglobin.
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Answer: (a) Salivary amylase enzyme is present in saliva. It is important because it breaks down starch to give sugar.
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