Human Biology, 14 Edition

Published by McGraw-Hill Education
ISBN 10: 1-25924-574-8
ISBN 13: 978-1-25924-574-9

Chapter 18 - Section 18.2 - Pre-embryonic and Embryonic Development - Check Your Progress - Page 393: 2

Answer

The extraembryonic membranes is consist of chorion, amnion, yolk sac, and allantois. The amnion is a thin ectodermal membrane filled with amniotic fluid which encloses the embryo. The chorion is responsible for gas exchange. The allantois is responsible for collecting nitrogenous waste. The yolk sac surround the yolk.

Work Step by Step

The extraembryonic membranes is consist of chorion, amnion, yolk sac, and allantois. The amnion is a thin ectodermal membrane filled with amniotic fluid which encloses the embryo. The chorion is responsible for gas exchange. The allantois is responsible for collecting nitrogenous waste. The yolk sac surround the yolk.
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