.... A possible functional significance for this intra-cardiac shunt has been debated for almost a century. Unilateral left vagotomy rendered the single effective pulmonary artery of the South American rattlesnake, Crotalus durissus , unable to adjust the magnitude of blood flow to the lung. The higher constant...

... (Crotalus viridis oreganus) to test this prediction. * Present address: Department of Biology, University of California, Los Angeles, CA 90024, USA. 17 05 1989 © 1989 by Company of Biologists 1989 thermoregulation pregnancy Crotalus Reptilia Past studies have shown...