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

Structure of the Eyeball

Anatomy & Physiology

15. The Special Senses

Structure of the Eyeball

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Multiple Choice

Which of the following structures forms the transparent, anterior part of the eye that covers the iris and pupil?

Cornea

Sclera

Retina

Lens

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Verified step by step guidance

Step 1: Begin by identifying the anatomical location of the structures listed in the question. The cornea, sclera, retina, and lens are all parts of the eye, but they serve different functions and are located in distinct regions.

Step 2: Understand the function and characteristics of the cornea. The cornea is the transparent, dome-shaped structure that forms the anterior part of the eye. It covers the iris and pupil and plays a crucial role in focusing light onto the retina.

Step 3: Compare the cornea with the sclera. The sclera is the white, opaque part of the eye that provides structural support and protection. It does not cover the iris and pupil, making it distinct from the cornea.

Step 4: Examine the retina. The retina is located at the back of the eye and is responsible for converting light into neural signals. It does not form the anterior part of the eye or cover the iris and pupil.

Step 5: Consider the lens. The lens is a transparent structure located behind the iris and pupil. It focuses light onto the retina but does not form the anterior covering of the eye. Based on these comparisons, the correct structure is the cornea.