Heart Lub Dub Sound

This occurs at the beginning of systole (when the heart contracts to pump blood out). It is caused by the closing of the atrioventricular (AV) valves :

Heartie was fascinated. She had never thought about her valves before, but now she realized they were like little doors that helped her do her job. heart lub dub sound

Interestingly, you can hear the "lub-dub" sound in different ways, depending on your listening method: This occurs at the beginning of systole (when

The "lub-dub" sound is an essential part of our bodily rhythms, and it's a reminder of the incredible work our hearts do every day! Interestingly, you can hear the "lub-dub" sound in

The sound isn't the valves hitting each other, but rather the of blood and the heart walls when the valves snap shut.

The "lub-dub" sound is made by the heartbeat, specifically the closing of the heart's valves. Here's a simplified explanation:

From that day on, whenever Heartie beat, she smiled to herself, thinking: "Lub... dub... lub... dub... I'm doing my thing, and I'm loving every beat!"