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

Introduction to Human Development

Anatomy & Physiology

28. Human Development

Introduction to Human Development

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Multiple Choice

The zona pellucida surrounds which of the following structures during early human development?

Morula

Blastocyst

Gastrula

Oocyte

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Understand the role of the zona pellucida: The zona pellucida is a glycoprotein layer surrounding the plasma membrane of mammalian oocytes. It plays a crucial role in fertilization and early embryonic development.

Identify the stages of early human development: The stages include the oocyte, zygote, morula, blastocyst, and gastrula. Each stage has distinct characteristics and structures.

Recognize the structure associated with the zona pellucida: The zona pellucida is present around the oocyte before fertilization and remains until the blastocyst stage, where it facilitates implantation.

Differentiate between the stages: The morula is a solid ball of cells, the blastocyst is a hollow structure with an inner cell mass, and the gastrula is formed after implantation with distinct germ layers.

Conclude the association: The zona pellucida surrounds the oocyte initially and continues to play a role until the blastocyst stage, but it is not associated with the morula or gastrula stages.