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首页> 外文期刊>Canadian Journal of Zoology >Aspects of lymph-heart function in Rana catesbeiana
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Aspects of lymph-heart function in Rana catesbeiana

机译：蛙蛙心中淋巴心脏功能的方面

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摘要

The effect of voluntary dives on the posterior lymph heart rate of the bullfrog, Rana catesbeiana, was tested and compared with the blood-heart rate (n = 6). This was performed by cannulating the posterior lymph heart and femoral artery simultaneously. Blood-heart rates during submergence were significantly lower (alpha = 0.05) then presubmergence rates at all sampling times. In contrast, the lymph hearts showed significantly lower rates only during the first and last submergence intervals. It is believed that the lymph-heart bradycardia found during these intervals is due in part to the physiological "preparations" for diving by the frog. Further information regarding posterior lymph heart contractions was gained by cannulating two posterior lymph hearts on one side of the frog (n = 5). It was found that these hearts beat within 100 ms of each other between 66 and 97% of the time (alpha = 0.05). The combined contraction of the three posterior lymph hearts could facilitate the movement of lymph through the outflow valve and into the venous circulation. This study represents the first time the axial coordination of homolateral lymph hearts has been shown to extend to the multiple posterior lymph hearts.
机译：测试了自由潜水对牛蛙蛙蛙的后淋巴心率的影响，并与血心率进行了比较（n = 6）。这是通过同时插管后淋巴心脏和股动脉来进行的。在所有采样时间，淹没期间的心率均显着低于淹没前（alpha = 0.05）。相反，仅在第一个和最后一个浸水间隔内，淋巴心脏的比率显着降低。据信在这些间隔期间发现的淋巴心动过缓部分归因于青蛙潜水的生理“准备”。通过在青蛙的一侧插管两个后淋巴心脏（n = 5），可以获得有关后淋巴心脏收缩的更多信息。已发现这些心脏在66％至97％的时间之间彼此间隔100毫秒以内跳动（alpha = 0.05）。三个后淋巴心脏的联合收缩可以促进淋巴通过流出瓣膜进入静脉循环的运动。这项研究代表首次证明同侧淋巴心脏的轴向协调作用延伸到多个后淋巴心脏。

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