Physiology describes the nature of life. It provides the framework for studying and exploring the bases of life. Physiologists view life from the simplest to the most complex levels of organisation – from the subcellular, to the whole person.
A department is composed of employed officials, known as civil servants, and is politically accountable through a minister. Most major departments are headed by a secretary of state, who sits in the cabinet, and typically supported by a team of junior ministers.