This document defines anatomy and its divisions. It discusses gross anatomy which looks at visible structures and microscopic anatomy which requires a microscope. It defines anatomical position as standing upright with palms facing forward. It describes directional terms like superior, inferior, anterior, and posterior. It discusses the three principal planes used to section the body - sagittal, coronal, and transverse. It notes the two main body cavities and divides the abdominal cavity into quadrants and regions to locate structures.