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

15. The Special Senses

Fibrous Layer of the Eyeball

Anatomy & Physiology

15. The Special Senses

Fibrous Layer of the Eyeball

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Multiple Choice

Which of the following statements is true of both the cornea and the sclera?

Both the cornea and the sclera are innervated.

Both the cornea and the sclera are avascular.

Both the cornea and the sclera anchor muscles that move the eye.

Both the cornea and the sclera are transparent to allow light to enter the eye.

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Verified step by step guidance

Begin by understanding the anatomy of the eye, focusing on the cornea and sclera. The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber, while the sclera is the opaque, fibrous, protective outer layer of the eye.

Consider the innervation of both structures. The cornea is highly innervated, providing sensitivity to touch, temperature, and chemicals, which is crucial for protective reflexes. The sclera also has nerve supply, although it is less sensitive compared to the cornea.

Examine the vascularity of the cornea and sclera. The cornea is avascular, meaning it does not contain blood vessels, which helps maintain its transparency. The sclera is also largely avascular, relying on the surrounding tissues for nutrient supply.

Evaluate the role of these structures in anchoring muscles. The sclera serves as the attachment point for the extraocular muscles that control eye movement. The cornea does not anchor these muscles.

Assess the transparency of these structures. The cornea is transparent to allow light to enter the eye, which is essential for vision. The sclera, however, is opaque and does not allow light to pass through.