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The circulatory system — Biology STD 10 — Question

ICSE BoardEnglish MediumSTD 10BiologyThe circulatory system1 Mark
MCQ
The heart beats __________ times in a minute.
  • A
    64
  • B
    60
  • ✓
    72
  • D
    90
✓

Answer

Correct option: C.
72
(c) 72
Explanation:
Rhythmic contractions and relaxations of auricles and ventricles is known as heart-beat. The contraction phase is systole, followed by relaxation phase known as the diastole.

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