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03 March 1972
Vol 175, Issue 4025

About The Cover

Acrylic casting of blood vessels in paw of gray wolf. Circulation in the paw of gray wolf. Circulation in the paw and toe pads is almost entirely in cutaneous plexuses. Flow of blood in arteries is into the center of plexuses; flow in veins is from the peripheries (about X 1.7). See page 988. [R. E. Henshaw, Pennsylvania state University, University Park]