Question

Identify the labelled parts of heart’s conduction system as depicted in the image.

• A. (i)SA node, (ii) Purkinjefibres,(iii) AV node, (iv) Bundle of His
• B. (i)Bundle of His, (ii) Purkinjefibres, (iii) AV node, (iv) SA node
• C. (i)Purkinjefibres,(ii)Bundle of His, (iii) SA node, (iv) AV node
• D. (i)SA node, (ii) AV node, (iii) Bundle of His, (iv) Purkinje fibres

Answer 1

The correct option is B

(i)Bundle of His, (ii) Purkinjefibres, (iii) AV node, (iv) SA node

The labelled parts in the image in order are Bundle of HIS, Purkinjefibres, AV node and SA node respectively. Electrical impulse travels from the SA node to the AV node from which it is transmitted through the bundle of HIS to the Purkinjefibres.