Fig. 3From: Evaluation of the physiological activity of venom from the Eurasian water shrew Neomys fodiens Cardiomyograms displaying changes in the frog heartbeat frequency after treatment with N. fodiens venom and S. araneus saliva. The heart activity after application of 40 μl of Ringer’s solution (control) (a, c), N. fodiens venom (in the 1st minute) (b), and S. araneus saliva (in the 1st minute) (d). The sample application is indicated by an arrowBack to article page