Figure 1
From: An integrated physiology model to study regional lung damage effects and the physiologic response
Anatomic human pulmonary model. Inspired gas enters the upper airway tree at the trachea and is delivered to the segmental compartments by a network of branching airway compartments. Each segmental compartment consists of a series of airway compartments leading to an alveolar compartment. The pulmonary circulation begins with the flow of deoxygenated blood from the heart; pulmonary arteries follow the path of the airway tree to the capillaries, where gas is exchanged with the alveolar regions. Oxygenated blood flows back to the heart via pulmonary veins.