In addition to differentiation by species, zoology also encompasses other types of research, such as animal physiology, behavioral ecology, evolutionary biology and ethology, the study of animal behavior.
Public health is personal. Public health professionals focus on preventing disease and injury by promoting healthy lifestyles. They implement educational programs, develop policies, administer services, conduct research, and regulate health systems to achieve these goals.
A health teacher works in an elementary, middle school, or high school to educate students on a variety of health topics including: exercise, nutrition, personal hygiene and sex education as well as diseases and disease prevention.