Circulatory and Respiratory System of a Crayfish Small 320×132 Medium 640×263 Large 1024×422 Download Tiff Original 2400×988 | (365.0 KB) Description Circulatory and respiratory system of the crayfish. C-heart with three pairs of ostia; Ps, pericardium; Ac, cephalic aorta; A, ab, abdominal aorta; As, sternal artery. The arrows indicate the direction of the flow. Keywords crayfish, crustacean Galleries Crustaceans Source: Beach, Fredrick Converse The Encyclopedia Americana (New York, NY: The Americana Company, 1903)
