ICSE Class 8 Answered
give reason
four heart valves are present in the heart.
Asked by nathsantanukumar | 03 May, 2018, 09:11: AM
Expert Answer
A normal, healthy heart valve minimizes any obstruction and allows blood to flow smoothly and freely in one direction. It closes completely and quickly, not allowing any blood to flow back through the valve.
Answered by Sivanand Patnaik | 04 May, 2018, 08:27: AM
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