The document describes the anatomical position and planes of the human body. The anatomical position refers to how the body is positioned for anatomical description, with the body standing upright and arms at the sides. There are three main anatomical planes - the median plane divides the body into left and right halves, sagittal planes are vertical and parallel to the median plane, and coronal planes separate the body into front and back. The document also defines common anatomical terms used to describe positions and directions in the body such as anterior, posterior, superior, inferior, medial, lateral, proximal, and distal.