AIIMS 2004 Zoology Circulatory System MCQ Question with Solution

In which one of the following pairs the two items mean one and the same thing?

A

malleus - anvil

B

SA node - pacemaker

C

leucocytes - lymphocytes

D

haemophilia - blood cancer

Correct Answer

Option B

Detailed Explanation

SA node or sino-atrial node is known as the pacemaker of heart because the cells in the SA node contract the most number of times per minute.

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