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: 3

Answer

Separate circuits will prevent the mixing of oxygenated and deoxygenated blood, ensuring the systemic circuit readily receives the most oxygen-rich blood. In addition, the rate of gas exchange is maximized since the most oxygen-poor blood is sent directly to the lungs for filtration.

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