Life: The Science of Biology 11th Edition

Published by W. H. Freeman
ISBN 10: 1-31901-016-4
ISBN 13: 978-1-31901-016-4

Chapter 49 - Circulatory Systems - 49.2 - Vertebrate Circulatory systems Evolved from Single to Double Circuits - 49.2 Recap - Learning Outcomes - Page 1049: 1


Most of the blood from the ventricle is under low pressure because much of the pressure has dissipated due to flow resistance in the narrow spaces of the gill lamellae. As a result, the blood that leaves the gills and enters the aorta is under low pressure, which severely limits the capacity of the fish circulatory system to deliver oxygen and nutrients to cells.

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