title: &lt;b&gt;ҚАЗАҚТЫҢ ЖАРТЫЛАЙ ҚЫЛШЫҚ ЖҮНДІ ҚҰЙРЫҚТЫ ҚОЙЫНЫҢ ЖӘНЕ «ВЕЛИКАН» ТҰҚЫМДЫ ҚОЯН ЖҮРЕГІНІҢ МАКРОСКОПИЯЛЫҚ МОРФОЛОГИЯСЫ&lt;/b&gt;
abstract: In this scientific study, the macroscopic morphology of the heart of the Kazakh semi-coarse wool fat-tailed sheep and the “Velikan” breed rabbit was comprehensively analyzed in a comparative manner. The structure of the heart in animals is one of the key morphological indicators that determine their physiological characteristics, the efficiency of the circulatory system, and their ability to adapt to environmental conditions. From this perspective, the investigation of heart structure across dif