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

12. The Central Nervous System

Introduction to the Central Nervous System

Anatomy & Physiology

12. The Central Nervous System

Introduction to the Central Nervous System

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Multiple Choice

Why are ganglia and nerves not surrounded by protective structures like the meninges of the central nervous system (CNS)?

Because ganglia and nerves are protected by bone instead of meninges.

Because the meninges only protect blood vessels, not nervous tissue.

Because ganglia and nerves are located deep within the brain and spinal cord.

Because ganglia and nerves are part of the peripheral nervous system, which is not enclosed by the meninges.

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Verified step by step guidance

Step 1: Understand the structural differences between the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS includes the brain and spinal cord, which are enclosed by protective meninges and surrounded by bone (skull and vertebrae). The PNS consists of ganglia and nerves, which are located outside of these protective structures.

Step 2: Recognize the role of meninges. Meninges are specialized protective layers (dura mater, arachnoid mater, and pia mater) that surround the CNS to provide physical protection and support, as well as to contain cerebrospinal fluid (CSF). These structures are not present in the PNS.

Step 3: Note the anatomical location of ganglia and nerves. Ganglia are clusters of neuron cell bodies, and nerves are bundles of axons. Both are part of the PNS and are located outside the brain and spinal cord, making them distinct from the CNS structures protected by meninges.

Step 4: Understand the functional distinction. The PNS is responsible for transmitting signals between the CNS and the rest of the body. Since ganglia and nerves are not enclosed by bone or meninges, they rely on other protective mechanisms, such as connective tissue coverings (epineurium, perineurium, and endoneurium).

Step 5: Conclude that the correct answer is based on the anatomical and functional separation of the CNS and PNS. Ganglia and nerves are part of the PNS, which is not enclosed by meninges, unlike the CNS.