The first heart sound (lub) is associated with: — Zoology | Mockzy

MediumZoologyBody fluid and circulation

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The first heart sound (lub) is associated with:

Opening of semilunar valves

Closure of tricuspid and bicuspid valves

Closure of semilunar valves

Opening of bicuspid valves

Cardiac output is defined as:

The second heart sound (dub) is associated with:

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