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.
Public Health Nurse. While most nurses care for one patient at a time, public health nurses care for entire populations. By working with whole communities, public health nurses are able to educate people about health issues, improve community health and safety and increase access to care.