- When A Heart Beats It Makes A Lub Dub Sound The Dub Is When 1 (42.33 KiB) Viewed 39 times
When a heart beats, it makes a lub dub sound. The dub is when:
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When a heart beats, it makes a lub dub sound. The dub is when:
When a heart beats, it makes a lub dub sound. The dub iswhen:
When the semi-lunar valves close at the beginning of the systole. Both the right and left AV valve close. When the semi lunar valves open at the end of systole. When the semi lunar valves closes at the end of the systole.
When the semi-lunar valves close at the beginning of the systole. Both the right and left AV valve close. When the semi lunar valves open at the end of systole. When the semi lunar valves closes at the end of the systole.
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