Biochemistry Physiology and Endocrinology Volume 3 is written by B. N. Pandey is a comprehensive academic textbook from the B.Sc. Zoology Series that defines the fundamental concepts of biochemistry, body physiology, and endocrine regulation in animals and humans. This book covers important topics like carbohydrates, proteins, lipids, enzymes, vitamins, metabolism, digestion, respiration, circulation, nervous coordination, reproduction, and hormonal control. It presents detailed explanations of endocrine glands including the pituitary, thyroid, pancreas, testes, and ovaries, along with their functions and hormone mechanisms. Designed for undergraduate zoology and life science students, the book combines theoretical concepts with examination-oriented questions, diagrams, and practical explanations to help students and prepare for academic exams effectively.