Endocrinology is one of the most fascinating fields of physiology that is playing an important role in human health and welfare. The book will stimulate the interest of young students and kindle in them a desire to read more intensively since it contains every aspect of hormonal coordination in the human body. The integration of cell signalling pathways, involvement of receptors in signal transduction, every aspect of endocrine glands with their dysfunctions, feedback loops and role of hormones in pharmaceutical industry-all these facts of endocrinology are incorporated in a comprehensive form. The book has been presented in a simple form with appropriate figures that would appeal to the undergraduate and postgraduate students of life sciences including Zoology, Biochemistry, Pharmacy, Health Science, Nursing and Medical Science. It is hoped that the book will meet the need of students who desire to learn clear, up-todate, and complete instances of endocrine glands that are elaborated in ten chapters. The presentation of every hormonal disorder with its laboratory evaluation, related symptoms, and illustrations based on a combination of quality and adequacy are significant markers of this book.