ABSTRACT The separation of the interior from the exterior environment through the skin was fundamental for the evolutionary progression from prevertebrates into vertebrates. The development of the skin also established an internal environment controlled by hormones. The skin is influenced by different hormones; it is also the largest endocrine organ, producing several hormones. Skin inspections often save lives from skin cancer but can also diagnose potentially deadly endocrine diseases. The objectives of this review were to describe the emergence and […]