The document discusses human anatomy and anatomical terminology. It defines anatomy as the study of the structure of the body. It then explains key anatomical positions and planes used to describe the orientation of structures in the body, including: frontal, sagittal, and transverse planes; lateral and medial; distal and proximal; anterior and posterior; superior and inferior; and supine and prone. Key terms like superficial, deep, abduction, adduction, dorsal, and ventral are also defined.