शिरा अलिंद पर्व (कोटरालिंद गाँठ SA node) को हृदय का गति प्रेरक (pacemaker) क्यों कहा जाता है?
शिरा अलिंद पर्व (कोटरालिंद गाँठ SA node) को हृदय का गति प्रेरक (pacemaker) क्यों कहा जाता है?
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