Q62 of 79 Page 54

Why do veins have thin walls as compared to arteries?

Veins have thin walls because blood flows inside them with low pressure and with a low speed. Whereas arteries have thick walls because blood flows inside them with high pressure and with a high speed.



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Match the terms in Column (A) with those in Column (B)























Column A



Column B



(a) Trypsin



(i) Pancreas



(b) Amylase



(ii) Liver



(c) Bile



(iii) Gastric glands



(d) Pepsin



(iv) Saliva