Question

What do you understand by the word lub and dub

Answer 1

Lub and Dub are the sounds heard when the heart beats the first sound Lub is heard when tricuspid and bicuspid valves close rapidly and the sound Dub is heard when the aortic and pulmonic valves snap shut.

Answer 2

The lub is the sound of the tricuspid and mitral values closing. The dub is the sound of the aortic and pulmonary valves closing.The sound of the heart lub-dub comes from the closer of two pairs of heart valves.