Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

28. Human Development

Extraembryonic Membrane Development

Anatomy & Physiology

28. Human Development

Extraembryonic Membrane Development

Previous problemNext problem

Problem 10a

Textbook Question

What are the four extra-embryonic membranes?

Verified step by step guidance

Understand that extra-embryonic membranes are structures that develop outside the embryo and play crucial roles in protection, nutrition, gas exchange, and waste removal during development.

Identify the first membrane: the amnion. The amnion surrounds the embryo and is filled with amniotic fluid, which cushions and protects the embryo from mechanical shocks.

Identify the second membrane: the chorion. The chorion contributes to the formation of the placenta in mammals and facilitates gas exchange between the embryo and the mother.

Identify the third membrane: the yolk sac. The yolk sac is involved in early blood cell formation and provides nutrients to the developing embryo in species with yolk-rich eggs.

Identify the fourth membrane: the allantois. The allantois is responsible for waste storage and also contributes to the development of the umbilical cord and the placenta in mammals.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Play a video:

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Extra-embryonic Membranes

Extra-embryonic membranes are structures that develop outside the embryo and play crucial roles in its protection and nourishment. In mammals, these membranes facilitate gas exchange, waste removal, and nutrient transfer, supporting the developing fetus throughout gestation.

Chorion

The chorion is the outermost extra-embryonic membrane, which forms the fetal part of the placenta in mammals. It is involved in gas exchange and nutrient transfer between the mother and the developing embryo, playing a vital role in sustaining pregnancy.

Amnion

The amnion is a membrane that encases the embryo in a fluid-filled sac, providing a protective environment. This amniotic fluid cushions the embryo, allowing for movement and protecting it from physical shocks, while also maintaining a stable temperature.

Watch next

Master Extraembryonic Membrane Development (Weeks 2-8) with a bite sized video explanation from Bruce Bryan

Start learning