Fig. 5.13. Frog anatomy. Organs labeled by number: (1) Right atrium, (2) Liver, (3) Aorta, (4) Egg mass, (5) Colon, (6) Left atrium, (7) Ventricle, (8) Stomach, (9) Left lung, (10) Spleen, (11) Small intestine, and (12) Cloaca