Distinctive features of the morphometric parameters of the heart of the Amur tiger (Panthera tigris altaica) in natural habitat and in captivityR.A. Zhilin, I.P. Korotkova, E.N. Lyubchenko, A.A. Kozhushko and D.V. KapralovE3S Web Conf., 258 (2021) 04010DOI: https://doi.org/10.1051/e3sconf/202125804010