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Sagot :
Final answer:
Isovolumetric contraction in the cardiac cycle occurs when the ventricles contract, increasing pressure before blood ejection, without a change in volume.
Explanation:
The most likely reason for isovolumetric contraction in the cardiac cycle is that initially, as the ventricular muscles contract, the pressure in the ventricles rises but is not yet high enough to open the semilunar valves for blood ejection.
During isovolumetric contraction, the volume of blood in the ventricles remains constant as the pressure increases before the ejection phase.
This phase allows for the ventricles to build up enough pressure for efficient blood ejection into either the aorta or pulmonary artery.
Learn more about Cardiac cycle here:
https://brainly.com/question/51138106
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