This health science diagram explains personal and human health reserves, the factors and principles of a healthy lifestyle, and the mechanisms of human health formation and maintenance from birth. Conducting research and diagnostics on a person's health, assessing his health reserves, and forming the focus on a healthy lifestyle, on the protection and improvement of health through the maintenance of a healthy lifestyle are all part of the health science diagram. One of the oldest and most important sciences in health science. Almost anyone, at any time of year, anywhere in the world, regardless of age or gender, needs the consultation or advice of a doctor regularly.