In which one of the following pairs the two items mean one and the same thing?
1. Malleus - anvil
2. SA node - pacemaker
3. Leucocytes - lymphocytes
4. Haemophilia - blood cancer

Subtopic:  Human Heart: Gross Anatomy | Rhythmic Excitation of Human Heart: Part 1 |
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In the nodal tissue of the human heart, the highest conduction velocity is seen in:

1. Internodal pathway 2. AV node
3. AV bundle or Bundle of His 4. Purkinje fibers
Subtopic:  Rhythmic Excitation of Human Heart: Part 1 |
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