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

19. The Blood Vessels

Arteries

Anatomy & Physiology

19. The Blood Vessels

Arteries

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Multiple Choice

Which of the following types of blood vessels have the proportionally thickest tunica media of all vessels?

muscular arteries

elastic arteries

arterioles

vasa vasorum

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Verified step by step guidance

Understand the structure of blood vessels: Blood vessels have three layers - tunica intima, tunica media, and tunica externa. The tunica media is primarily composed of smooth muscle and elastic fibers, and its thickness varies among different types of vessels.

Identify the function of the tunica media: The tunica media is responsible for regulating the diameter of the blood vessel, which in turn affects blood pressure and flow. Vessels with thicker tunica media can exert more control over these factors.

Compare the types of blood vessels: Muscular arteries have a thick tunica media with more smooth muscle, allowing them to regulate blood flow to specific areas. Elastic arteries have a tunica media rich in elastic fibers, enabling them to withstand high pressure and maintain blood flow during diastole. Arterioles have a relatively thick tunica media compared to their size, crucial for controlling blood flow into capillary networks. Vasa vasorum are small vessels that supply the walls of larger vessels and do not have a thick tunica media.

Evaluate the options: Muscular arteries have the proportionally thickest tunica media due to their high content of smooth muscle, which is essential for their role in distributing blood to various parts of the body.

Conclude the analysis: Based on the comparison, muscular arteries have the proportionally thickest tunica media among the given options, allowing them to effectively regulate blood flow and pressure.