a particular complex anatomical part of a living thing and its construction and arrangement

a plexus of lymph nodes in the lower portion of the abdominal aorta

a network of intersecting nerves

a vascular plexus of the cerebral ventricles that regulate intraventricular pressure

a lymphatic plexus located along the lower portion of the aorta and iliac vessels

a plexus of veins draining the region of the pterygoid muscles and draining into the internal maxillary and anterior facial veins