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

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which structure forms a protective covering over the exposed surface of the eyeball?

Iris

Lens

Retina

Cornea

Previous problemNext problem

Verified step by step guidance

Step 1: Begin by identifying the anatomical structures listed in the problem: Iris, Lens, Retina, and Cornea. Understand their functions and locations in the eye.

Step 2: Recall that the cornea is a transparent, dome-shaped structure that covers the front of the eye, including the iris and pupil. It serves as a protective barrier against dust, germs, and other harmful particles.

Step 3: Understand the role of the cornea in refracting light to help focus it onto the retina, which is essential for vision. This highlights its dual function as both a protective covering and a part of the optical system.

Step 4: Compare the cornea's function to the other options: The iris controls the size of the pupil, the lens focuses light onto the retina, and the retina processes light signals to send to the brain. None of these structures serve as a protective covering over the exposed surface of the eyeball.

Step 5: Conclude that the cornea is the correct answer because it is the structure that forms a protective covering over the exposed surface of the eyeball.