Comparative Histology of the Human and Teleost Fish Thymus / Histologia Comparativa De Timo De Humanos E Peixes Teleósteos

Abstract

Thymus is considered a key component of the vertebrates' immune system. It is an organ that is only found in these animals whose development may be accompanied through the evolutionary scale, being considered as a facilitator and regulator in the interaction of lymphoid cells and lymphoid organs. In this study not only a morphological but also functional homology were demonstrated, in that it affects the immune system, of the humans and teleost fish thymus. The material of study was composed of the thymus tissue samples of humans who were donated by the