Figure 7 in The Testaria concept (Polyplacophora + Conchifera) updated

Figure 7. Testaria: scheme of the gono-pericardial system (from Salvini-Plawen 2006). ao, aorta; aob, bulb of aorta; at, heart auricle; em, emunctorium (excretory organ); exd, lower pericardioduct or excretory duct ('ureter'); exs, excretory sac; gd, gonoduct; gdg, gonoduct gland; go, gonad; gpd, gono-pericardial interconnection; pc, pericardium; pd, upper pericardioduct ('reno'-pericardial canal); ve, heart ventricle. Arrows indicate direction of haemolymph flow.