Q. Approx. how many times each day, do our heart valves open & close normally

  • (A) 10,000 times
  • (B) 1,00,000 times
  • (C) 1,50,000 times
  • (D) 2,00,000 times
✅ Correct Answer: (B) 1,00,000 times

Published by Ram Sharma ⭐ 193.88K Points at 07-May-2022 09:01 pm in Biology

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