Biology - Single MCQs (Page 69)

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Q681. In human beings duration of cardiac cycle is?...Q682. In blood of Cockroach which is absent?...Q683. Impulse originating from SA node is transmitted to?...Q684. Hypertension is not caused by?...Q685. Heart wall is made of?...Q686. Heart of cockroach is?...Q687. Heart of cockroach has?...Q688. Heart is perfectly four-chambered in?...Q689. Heart beat originate from?...Q690. Heart beat is initiated by?...