There are few more fundamental concepts or fields of study in the living sciences than anatomy and physiology. Anatomy is the study of the structure and physical connections of the body’s internal and exterior parts, whereas physiology is the study of how those parts work. Anatomy and physiology are discussed and summarized, along with their significance to medical applications. The axial and appendicular portions of the human body are the two primary divisions. The cranium, cervical spine, thoracic cavity, abdominal cavity, and pelvis make up the axial portion, while the limbs, both upper and lower, make up the appendicular portion. In addition, we examined cell theory, the most common organic chemicals and other components present in cells, and the role of the plasma membrane in regulating the thickness and inner concentrations of cells. This book covers topics such as Nervous system, Small intestine and large intestine, Anatomy and functions of salivary glands, Respiratory system And Urinary system, Regulation of respiration, Role of RAS in kidney and disorders of kidney, Endocrine system, Mechanism of hormone action, Glands, Reproductive system, Gametogenesis, Introduction to genetics and many more.