The human body is divided into several levels of organization,
from the simplest to the most complex. These levels
are chemical, cellular, tissue, organ, organ system, and
organism. Anatomy is the study of the structure of the human
body. Physiology is the study of its functions. Directional
terms are used to describe the location of body parts
and regions. These terms always relate to the anatomic
position. It is important to understand the basics of the
organization of the human body before studying the
individual systems. |