Mondino's description of the human heart, though inaccurate, is fairly detailed. He discusses three chambers: the right ventricle, the left ventricle, and a middle ventricle within the septum. The right ventricle is purported to contain a large opening, through which the heart draws blood originating in the liver, as well as the opening of the "vena arterialis" toward the lung. The left ventricle contains an orifice with three valves and the bivalvular opening of the "arteria venalis", which allows the passage of a smoke-like vapor from the lungs. Despite these anatomical shortcomings, the "vena chili" (Mondino's name for the vena cava) is noteworthy in its accuracy. He then moves on to the lungs, describing the course of the "vena arterialis" (pulmonary artery) and the "arteria venalis" (pulmonary vein). This section of "Anathomia" also describes the pleura and notes the importance of distinguishing between pulmonary pathologies including true pleurisy, false pleurisy, and pneumonia. His descriptions of the larynx and epiglottis are very rudimentary.