Changes of intra-organ's vascular bed of the thymus in the comparative morphological rows of immature mammalian animals

With the use of methods of light microscopy we produce comparison morphological investigation of the intra organ vascular bed of a thymus in animals and human. The article represents of analysis of morphological imaging different parts of the vascular bed in the comparative morphological a number of four classes of vertebral animals (Chordata, Tetrapoda): Amphibia, Reptilia, Aves, Mammalia. Therefore differences in nature of blood supply of cortical and medullar substance of a thymus of vertebrata are found. It has revealed the similarities and the differences in the structure of vascular bed of thymus gland of vertebral animals which are remarkable for the organization level, biological features and for their adaptation to the habitat.