Table of contents

1. Introduction to Anatomy & Physiology5h 40m
2. Cell Chemistry & Cell Components12h 37m
3. Energy & Cell Processes10h 7m
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 Blood1h 22m
18. The Heart1h 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 Balance Coming soon
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity Coming soon

19. The Blood Vessels

General Blood Vessel Structure

Anatomy & Physiology

19. The Blood Vessels

General Blood Vessel Structure

2:19 minutes

Problem 12

Textbook Question

Multiple Choice More than one choice may apply. Which layer of the artery wall thickens most in atherosclerosis? a. Tunica media b. Tunica intima c. Tunica adventitia d. Tunica externa

Verified step by step guidance

Identify the layers of the artery wall: tunica intima, tunica media, and tunica adventitia (also known as tunica externa).

Understand that atherosclerosis is a condition characterized by the buildup of plaques within the artery walls.

Recognize that these plaques primarily form in the innermost layer of the artery wall.

Recall that the tunica intima is the innermost layer of the artery wall.

Conclude that the tunica intima is the layer that thickens most in atherosclerosis.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Atherosclerosis

Atherosclerosis is a condition characterized by the buildup of plaques, which are made up of fat, cholesterol, and other substances, in the arterial walls. This process leads to the thickening and hardening of the arteries, which can restrict blood flow and increase the risk of cardiovascular diseases. Understanding this condition is crucial for identifying which layer of the artery wall is most affected.

Layers of the Artery Wall

The artery wall consists of three main layers: the tunica intima (inner layer), tunica media (middle layer), and tunica adventitia (outer layer). Each layer has distinct functions and structural characteristics. The tunica media is primarily composed of smooth muscle and elastic fibers, while the tunica intima is lined with endothelial cells, making it essential to understand their roles in vascular health and disease.

Tunica Intima and Atherosclerosis

In atherosclerosis, the tunica intima is the layer that thickens most significantly due to the accumulation of lipids and inflammatory cells. This thickening can lead to the formation of plaques that protrude into the lumen of the artery, causing narrowing and potential blockage. Recognizing the impact of atherosclerosis on the tunica intima is vital for understanding the disease's progression and its implications for cardiovascular health.