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  • Title: [Cardiac minute volume and its pattern in Rana ridibunda frogs].
    Author: Brod VI, Viazovoĭ VV, Golub' AS, Shoshenko KA.
    Journal: Zh Evol Biokhim Fiziol; 1984; 20(1):101-4. PubMed ID: 6367316.
    Abstract:
    In frogs with an average body mass 56 g, the minute volume of the heart is equal to 4.5 ml/min X 100 g, which is approximately an order lower than in mammals with the same body mass. Pulmonary fraction constitutes 52% of the minute volume of the heart. The main bulk of systemic fraction of the minute volume of the heart (78%) passes to locomotor system and skin, whereas 19% of this volume are adressed to vegetative organs. This pattern of distribution significantly differs from that in mammals with a similar body mass, in which the vegetative and locomotor fractions are approximately equal. Differentiation in muscular blood supply was noted--there is a threefold difference in the volume of blood flow between gastrocnemius and submandibular muscles.
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