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

Embryonic Development (Weeks 3-8)

Anatomy & Physiology

28. Human Development

Embryonic Development (Weeks 3-8)

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which of these characteristics is shared by both amniotic eggs and placental mammal eggs during embryonic development?

Direct nutrient absorption from the mother

External fertilization

Presence of an amnion

Lack of a yolk sac

Previous problemNext problem

Verified step by step guidance

Understand the concept of amniotic eggs: Amniotic eggs are characterized by the presence of an amnion, a membrane that surrounds the embryo, providing a protective environment.

Recognize the role of the amnion in embryonic development: The amnion is crucial for both amniotic eggs and placental mammal eggs as it creates a fluid-filled cavity that cushions the embryo.

Identify the shared characteristic: Both amniotic eggs and placental mammal eggs have an amnion, which is a key feature in their development.

Differentiate between other characteristics: Direct nutrient absorption from the mother is specific to placental mammals, while external fertilization is not a characteristic of either amniotic or placental mammal eggs.

Clarify the presence of a yolk sac: While amniotic eggs typically have a yolk sac for nutrient supply, placental mammals rely on the placenta for nutrient transfer, making the presence of an amnion the shared characteristic.