ClipArt ETC
"Diagram of the heart and branchial arches in the Frog. c.g., carotid gland; l., lungs; l.a., left auricle; r.a., right auricle...a, aorta; au., auricle; c, carotid; c.v., cardinal veins (right and left); d.a., dorsal arteries; j, jugular veins; d.c., ductus Cuvieri; s.v., sinus venosus; v, ventricle." -Galloway, 1915

Frog Heart

"Diagram of the heart and branchial arches in the Frog. c.g., carotid gland; l., lungs; l.a., left auricle;…