Right-to-left shunt has modest effects on CO2 delivery to the gut during digestion, but compromises oxygen delivery

  title={Right-to-left shunt has modest effects on CO2 delivery to the gut during digestion, but compromises oxygen delivery},
  author={C. Malte and H. Malte and L{\ae}rke R{\o}nlev Reinholdt and Anders Findsen and J. Hicks and T. Wang},
  journal={Journal of Experimental Biology},
  pages={531 - 536}
ABSTRACT By virtue of their cardiovascular anatomy, reptiles and amphibians can shunt blood away from the pulmonary or systemic circuits, but the functional role of this characteristic trait remains unclear. It has been suggested that right-to-left (R–L) shunt (recirculation of systemic blood within the body) fuels the gastric mucosa with acidified and CO2-rich blood to facilitate gastric acid secretion during digestion. However, in addition to elevating PCO2, R–L shunt also reduces arterial O2… Expand
Does the left aorta provide proton-rich blood to the gut when crocodilians digest a meal?
Cardiovascular shunting in vertebrates: a practical integration of competing hypotheses
Feeding alters blood flow patterns in the American alligator (Alligator mississippiensis).


The interaction of pulmonary ventilation and the right-left shunt on arterial oxygen levels.
Ligation of the left aorta in alligators affects acid–base balance: A role for the R→L shunt
Patterns of cardiovascular and ventilatory response to elevated metabolic states in the lizard Varanus exanthematicus.
Susceptibility of different gases to ventilation-perfusion inequality.
  • P. Wagner
  • Chemistry, Medicine
  • Journal of applied physiology: respiratory, environmental and exercise physiology
  • 1979
Effects of feeding on arterial blood gases in the American alligator Alligator mississippiensis.
The Right‐to‐Left Shunt of Crocodilians Serves Digestion
Pulmonary gas exchange during intermittent ventilation in the American alligator.
The respiratory consequences of feeding in amphibians and reptiles.
  • T. Wang, M. Busk, J. Overgaard
  • Biology, Medicine
  • Comparative biochemistry and physiology. Part A, Molecular & integrative physiology
  • 2001
Ventilatory and cardiovascular responses of a python (Python molurus) to exercise and digestion.