When listening to a heartbeat it consists of two thumps. Is it contracting twice very quickly or is the second thump caused by something else?
In: Biology
~~The first thump (“Lub”) is the heart pulling blood in to exchange gases. The second thump (“Dupp” or “Dub”) is the heart pushing blood out after oxygen is replenished by the lungs.~~
“Lub” is the sound of one set of valves opening, and “dub” is the sound of the other set of valves opening.
EDIT: I have been corrected, and I apologize.
Latest Answers