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Quarterly Journal of Experimental Physiology 69.3 pp 599-606
© The Physiological Society 1984
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BLOOD FLOW AND ABSORPTION FROM THE RUMEN

A. Dobson 1

1 Department of Physiology, New York State College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, U.S.A.

Blood flow to the ruminoreticular epithelium varies cyclically with feeding. Within this range the absorption of rapidly penetrating solutes will be dependent on the blood flow. For HTO absorption, the most satisfactory model suggests the involvement of a countercurrent exchanger behind the epithelium. The consequences of this arrangement are presented, and are qualitatively consistent with known effects of solute absorption on net water movement. The control mechanisms for net water absorption are not fully identified. The observed blood flows in the splanchnic region raise interesting questions of functional changes in the omasum and fat.






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Copyright © 1984 by the The Physiological Society.