Are the same skull bones present in the adult also found in the fetal skull?
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Ответ:
Option D.
Semilunar valves closing.
Explanation:
Heart sounds refer to the noises produced when the heart beat and blood flow through the heart.
The second heart sounds called dub is produced when semilunar valves closes which are the aortic and pulmonary valves. The sound produced by the closure of aortic verve is called A2 and the sound produced by the closing pulmonary verve is called p2. The A2 sound is Louder than the P2 sound because of the high pressure in the left chamber of the heart.