Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 41 - 41.2 - Concept Check - Page 903: 1

Answer

Gastrovascular cavities have only one opening for ingestion and elimination, whereas alimentary canals have two separate openings.

Work Step by Step

For comparison, a jellyfish has a gastrovascular cavity on its underside. Humans have an alimentary canal. The jellyfish take in food and expel waste from the gastrovascular cavity, whereas humans have an elongated digestive system with each of these functions on opposite ends.
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