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 Heart2h 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

19. The Blood Vessels

General Blood Vessel Structure

Anatomy & Physiology

19. The Blood Vessels

General Blood Vessel Structure

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Multiple Choice

Which blood vessel layer contains the greatest proportion of collagen?

Tunica intima.

Tunica media.

Tunica externa.

The elastic laminae.

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Verified step by step guidance

Understand the structure of blood vessels: Blood vessels have three main layers - tunica intima, tunica media, and tunica externa.

Identify the composition of each layer: The tunica intima is the innermost layer, primarily composed of endothelial cells. The tunica media is the middle layer, mainly consisting of smooth muscle cells and elastic fibers. The tunica externa, also known as tunica adventitia, is the outermost layer.

Focus on the tunica externa: This layer is rich in connective tissue, particularly collagen fibers, which provide structural support and protection to the blood vessel.

Compare the layers: While the tunica media contains elastic fibers and smooth muscle, the tunica externa has the greatest proportion of collagen, making it the most fibrous layer.

Conclude the analysis: Based on the composition, the tunica externa is the layer with the greatest proportion of collagen, which is crucial for the durability and resilience of blood vessels.