A heartbeat heard with a stethoscope sounds like lubb dupp

Last updated: 6/20/2023

A heartbeat heard with a stethoscope sounds like lubb dupp The lubb sound is due to the A AV valves closing and the ventricles contracting B AV valves opening and the ventricles contracting Pulmonary and aortic valves open and the ventricle relaxing D Pulmonary and aortic valves closing and the ventricles relaxing Question 48 The right atrium receives blood directly from A the superior vena cava and inferior vena cava only