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Transportation of Food and Minerals in Animals and Plants — BIOLOGY STD 8 — Question

ICSE BoardEnglish MediumSTD 8BIOLOGYTransportation of Food and Minerals in Animals and Plants1 Mark
Question
Define term : heartbeat
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Answer

The sound $($lub$-$dub$)$ produced by contraction of auricles and ventricles is called heartbeat.

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