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Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBody Fluids and Circulation1 Mark
MCQ
The time taken for the atrial systole is:
  • A
    0.56s
  • B
    0.1s
  • C
    0.3s
  • D
    0.8s
✓

Answer

  1. 0.1s

Explanation:

  • Atrial systole:- lasts about 0.1 seconds, both atria contract and force the blood from the atria into the ventricles.
  • Ventricular systole:- lasts about 0.3 seconds, both ventricles contract, blood is forced to the lungs via the pulmonary trunk and the rest of the body via the aorta.

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