16. Identify what causes each of the following sounds of the heart S1 (lub). S2 (dub)
16. Identify what causes each of the following sounds of the heart S1 (lub). S2 (dub)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Transcribed Image Text:16. Identify what causes each of the following sounds of the heart
S1 (lub).
S2 (dub)
Expert Solution
Introduction:
During the cardiac cycle, there are many mechanical activities happening in the heart such as the opening and closing of various valves, and the swish of the blood flow when contractions of heart chambers happen. The contractions of muscles are also mechanical and hence must add to the sounds. But two specific sounds that stand out and can be heard during the normal auscultation of the heart are the lub and dub.
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