Kidney Embryology The URETERIC bud (Mesonephros) stimulates to Metanephric mesenchyma to develops: Glomerulus, renal tubules to distal convulated Heart Embryology Focus in this MindMap the relation between "TBP PS" & "AST TCR" mnemonics: Truncus arteriosus origins Ascending aorta and pulmonary trunk. Bulbus cordis origins Smooth parts. Primitive ventricle origins Trabeculade ventricles. Primitive atrium origins Trabeculade atrials. Sinus venosus has 2 horns: left origins Coronary sinus and right Right atrium smooth part. Source