Explanation It forms the extraembryonic membrane when the primary tissue layer of a bird embryo is extended outside the embryo. The extraembryonic membranes are divided into four layers: yolk sac, chorion, amnion, and allantois membrane. The functions of these extraembryonic membranes are as follows: 1. Yolk sac forms the layer around the yolk and it provides nutrients to the embryo. 2. Chorion is the outermost membrane that conducts nutrients from the yolk to the embryo...

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN: 9781305389892

Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher: Cengage Learning

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Question

Chapter 50.2, Problem 3SB

Summary Introduction

To explain:

The extraembryonic membrane in birds and its functions.

Introduction:

Birds are the amniotic animals that lay eggs, which contains an embryo enclosed in amniotic fluid. The yolk occupies the entire volume of the eggs in birds unlike the eggs of a mammal that contain less yolk. Yolk serves as food for the growing embryo.

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Chapter 50.2, Problem 2SB

Chapter 50.3, Problem 1SB

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Chapter 50 Solutions

Biology: The Dynamic Science (MindTap Course List)

Ch. 50.1 - Prob. 1SB Ch. 50.1 - Prob. 2SB Ch. 50.2 - Prob. 1SB Ch. 50.2 - Prob. 2SB Ch. 50.2 - Prob. 3SB Ch. 50.3 - Prob. 1SB Ch. 50.3 - Prob. 2SB Ch. 50.4 - Prob. 1SB Ch. 50.4 - Prob. 2SB Ch. 50.5 - Prob. 1SB

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Solution Summary: The author explains that the extraembryonic membrane is the primary tissue layer of a bird embryo, which is extended outside the embryo.

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