Figure 3.

Ventricular structure of Group 2. (A) Sagittal section of the heart, showing the ventricular lumen, conus valves (white arrows) and bulbus arteriosus. (B) Sagittal section. Trabecular sheets in the myocardium, delimiting several lacunae (intertrabecular spaces) (white asterisks). Note the shape and distribution of the lacunae, lending the myocardium a net‐like appearance. (C) Sagittal section with detail of the lacunae (black arrows) deepening towards the ventricular periphery. b, bulbus arteriosus; lu, lumen; ts, trabecular sheets; v, ventricle. Scale bars: (A) 5 mm; (B) 2 mm; (C) 2 mm.