Biology 12th Edition

by Mader, Sylvia; Windelspecht, Michael

Published by McGraw-Hill Education

ISBN 10: 0078024269

ISBN 13: 978-0-07802-426-9

Chapter 32 - Circulation and Cardiovascular Systems - Assess - Page 619: 1

Answer

Work Step by Step

Cnidarians, flatworms and nematodes are all animals that lack a true circulatory system.

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