The tendinous cords of the tricuspid valve are tightened or relaxed when the right ventricle contracts?

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

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Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.