Morphometry of the internal structures of the graylag goose (Anser anser) heart

Abstract

As a result of our research, it was found that the heart of the graylag goose Anser anser is a hollow muscular organ weighing 28.950±0.08 g in females (relative 0.73%), 29.091±0.09 (0.69%) in males, with a length: ♀ 51.55±0.07 mm, ♂ 52.66±0.08; it is oval, slightly elongated. Auricular appendices are oval, slightly elongated, in size: the right one with a length ♀14.98±0.05 mm, ♂ 15.57±0.06; with a width ♀ 21.99±0.0 mm, ♂ 22.23±0.05; their wall thickness data are as follows: ♀ 0.47±0.05 mm, ♂ 0.49±0.06; left – ♀ 12.27±0.05 mm, ♂ 12.98±0.06; ♀ 14.89±0.07 mm, ♂ 15.04±0.08; ♀ 0.71±0.03, ♂ 0.78±0.02 mm, respectively; the convex base. The pectineus muscles are located in the walls of the auricular appendices. From the interatrial crest, four to eight pectineal muscles extend, which are connected by smaller muscles, thereby forming a finely looped network. The left ventricle is ♀ 40.97±0.09 mm long, ♂ 41.05±0.08; with a width ♀ 14.89±0.09, ♂ 14.98±0.09; wall thickness ♀ 8.29±0.05, ♂ 8.35±0.07. It contains a tricuspid valve, which has three cusps: septal, caudal, lateral. The right ventricle is ♀ 31.39±0.05 mm long, ♂ 31.49±0.05; with a width ♀ 6.29±0.03, ♂ 6.39±0.05; wall thickness ♀ 2.89±0.03, ♂ 2.91±0.04, has a crescent-shaped atrioventricular opening. The valve length is ♀ 19.17±0.04 mm, ♂ 21.17±0.05 mm.