Introduction to Thorax Contents Dr. Whitehead 1. Essential to the study of anatomy is an understanding of the anatomical planes .
Sagittal sections are parallel to the median plane.
Adjectives, arranged as opposites, describe the relationships of anatomical structures. Proximal vs. Distal 3. An understanding of the compartmentalization of the thorax can be gained by understanding its development . Before the lungs develop, the chest is a cavity, lined by a thin membrane, the pleura . As the lungs grow, they push into this pleural sac and get covered by pleura.