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Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBody Fluids and Circulation1 Mark
MCQ
Contraction of heart is:
  • A
    Diastole
  • B
    Systole
  • C
    Joint diastole
  • D
    None of the above
✓

Answer

  1. Systole

Explanation:

Systole is defined as the ventricular contraction of heart which occurs between the first and second heart sounds of the cardiac cycle. There is pumping of blood into the aorta and pulmonary trunk and lasts for 0.3 - 0.4 second. During systole arterial blood pressure is maximum. 

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