Circulation of a Fish Small 198×320 Medium 396×640 Large 634×1024 Download Tiff Original 1485×2400 | (744.1 KB) Description Diagram of the circulation of the fish. Labels: a, branchial circulation; b, somatic circulation; c, heart; d, auricle; e, ventricle; f, arterial trunk. Keywords circulation, fish Galleries Fish Anatomy Source: Vaughn, I. Strangeway's Veterinary Anatomy (Toronto, CAN: J. A. Carveth & Co., Ltd., 1904)