Those interested in learning about the human body and human diseases may find programs in human biology fascinating. As a general study of the form and function of the body and its internal organs, classes in human biology can provide students with a basic understanding of physiology and disease.

A PhD, or Doctorate of Philosophy, is the highest degree awarded in many academic fields. Generally requiring a research project and dissertation, as well as several years of study, a doctorate degree qualifies the holder as an expert in a chosen field.

Part-time learning allows one to obtain a degree or qualification even if one cannot attend school on a full-time basis. One can learn at one's own pace, gradually accumulating credits that count towards a final qualification.