Resumption of rhythmic pulsations in small pieces of frog hearts after freezing in liquid nitrogen.
D000818:Animals; D001001:Anura; D003451:Cryoprotective Agents; D005615:Freezing; D006321:Heart / Q000502:physiology*; D006329:Heart Conduction System; D066298:In Vitro Techniques; D009119:Muscle Contraction; D009584:Nitrogen; D014021:Tissue Preservation
D003451:Cryoprotective Agents; D009584:Nitrogen