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.
Health educators and community health workers must think creatively about how to improve the health of the community through health education programs. In addition, they may need to solve problems that arise in planning programs, such as changes to their budget or resistance from the community they are serving.