Table of contents

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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 part of the retina lacks photoreceptors?

Fovea centralis

Optic disc

Retinal periphery

Macula lutea

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Verified step by step guidance

Begin by understanding the structure of the retina, which is the light-sensitive layer at the back of the eye. It contains photoreceptors that convert light into neural signals.

Identify the different parts of the retina mentioned in the problem: fovea centralis, optic disc, retinal periphery, and macula lutea.

The fovea centralis is a small pit in the retina responsible for sharp central vision and contains a high density of cone photoreceptors.

The macula lutea surrounds the fovea and is also rich in photoreceptors, contributing to detailed vision.

The optic disc is the point where the optic nerve exits the eye. It is known as the 'blind spot' because it lacks photoreceptors, meaning it does not detect light.