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

1. Introduction to Anatomy & Physiology

Anatomical Position

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Anatomical Position

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Multiple Choice

The dural sheath around the spinal cord is formed from which of the following?

Pia mater

Periosteal layer of the dura mater

Meningeal layer of the dura mater

Arachnoid mater

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Verified step by step guidance

Understand the structure of the meninges, which are protective layers surrounding the brain and spinal cord. The meninges consist of three layers: the dura mater (outermost), arachnoid mater (middle), and pia mater (innermost).

Recognize that the dura mater itself has two layers: the periosteal layer (closely attached to the skull in the cranial cavity) and the meningeal layer (which extends down to form the dural sheath around the spinal cord).

Clarify that the periosteal layer of the dura mater is only present in the cranial cavity and does not extend to the spinal cord. Therefore, it cannot form the dural sheath around the spinal cord.

Understand that the meningeal layer of the dura mater separates from the periosteal layer in the spinal region and forms the dural sheath, which surrounds and protects the spinal cord.

Eliminate other options: The pia mater is the innermost layer directly adhering to the spinal cord, and the arachnoid mater is the middle layer, neither of which forms the dural sheath. Thus, the correct answer is the meningeal layer of the dura mater.