Since ethics deals with all aspects of human behaviour and
decision-making, it is a very large and complex field of study
with many branches or subdivisions. The focus of World Medical Association Manual (2015, 3rd edition) on medical ethic is medical ethics, the branch of ethics that deals with moral issues in medical practice. Medical ethics is closely related, but not identical to, bioethics (biomedical ethics). Whereas medical ethics focuses primarily on issues arising out of the practice of medicine, bioethics is a very broad subject that is concerned with the moral issues raised by developments in the biological sciences more generally. Bioethics also differs from medical ethics insofar as it does not require the acceptance of certain traditional values that are fundamental to medical ethics.