Definition: The term "subpulmonary" refers to a region within the lungs, specifically in the lower part of the lung called the alveolar sac. This area is known for its extensive network of small blood vessels that supply oxygenated blood to the alveoli (small air sacs) and helps to circulate carbon dioxide out of the body. The subpulmonary region is crucial for maintaining the function of the respiratory system, as it plays a role in regulating vital functions such as
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