of the heart

A p. derived from the cardiac p. and distributed with the posterior coronary artery of the heart and its branches, posterior pulmonary p. A p. situated on the posterior surface of the root of the lung, formed by the union of the posterior pulmonary branches of the pneumogastric nerve with branches from the second, third, and fourth thoracic ganglia of the sympathetic system, prostatic p. i. A sympathetic p.formed from branches of the inferior hypogastric p., and distributed to the prostate gland, the vesicula seminal is, and the erectile ti ue of the penis. 2. A venous network surrounding the prostate gland, into which the dorsal vein of the penis empties, pterygoid p. A venous p. between the temporal is and pterygoideus extern us, formed of branches of the internal maxillary vein.