File:Fetal heartbeat 01.mp3: Revision history

From Embryology

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9 August 2010

  • curprev 18:1618:16, 9 August 2010S8600021 talk contribs 465 bytes +465 ==Human Fetus (17 week) heart beat== The characteristic "lub-dup" sounds are associated with closing of heart valves. The first sound (lub) occurs as atrioventricular valves close and signifies beginning of systole (contraction) The second sound (dup)