Physiology of bone remodeling is presented with the role of parathyroid glands, C cells and vitamin D explaining the bone as an endocrine organ. The regulation of male and female reproductive functions is represented well. Lastly, the book reviews the novel endocrine role and metabolic aspects of adipose tissue as an endocrine tissue and its relationship to inflammatory diseases, insulin resistance and many metabolic disorders. The book introduces key parts for endocrine’s stem cell in each gland is discussed in term of its survival, proliferation, migration, homing, differentiation and its regeneration and remodeling roles.