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

Veins

Anatomy & Physiology

19. The Blood Vessels

Veins

Previous problemNext problem

1:56 minutes

Problem 8

Textbook Question

In comparing a parallel artery and vein, you would find that

a. The artery wall is thicker
b. The artery diameter is greater
c. The artery lumen is smaller
d. The artery endothelium is thicker

Verified step by step guidance

Understand the structural differences between arteries and veins: Arteries are designed to handle higher pressure from blood being pumped directly from the heart, while veins carry blood back to the heart under lower pressure.

Recall that artery walls are thicker than vein walls because they contain more smooth muscle and elastic fibers to withstand the high pressure of blood flow.

Consider the lumen (the hollow interior space) of arteries and veins: Arteries generally have a smaller lumen compared to veins, as their thicker walls reduce the internal space available for blood flow.

Analyze the diameter of arteries versus veins: While veins may appear larger in diameter due to their thinner walls and larger lumen, arteries are structurally more robust and have thicker walls overall.

Evaluate the endothelium (the inner lining of blood vessels): The endothelium thickness is not significantly different between arteries and veins, as it serves the same basic function in both types of vessels.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Video duration:

Play a video:

Was this helpful?

Key Concepts

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

Artery vs. Vein Structure

Arteries and veins have distinct structural differences that reflect their functions. Arteries have thicker walls composed of more smooth muscle and elastic tissue, allowing them to withstand higher pressure from the heart's pumping action. In contrast, veins have thinner walls and larger lumens, which accommodate the lower pressure of blood returning to the heart.

Lumen Size

The lumen refers to the interior space of a blood vessel through which blood flows. In general, arteries have a smaller lumen compared to veins, which is a result of their thicker walls. This smaller lumen in arteries helps maintain higher blood pressure necessary for efficient blood circulation throughout the body.

Endothelium Thickness

The endothelium is the thin layer of cells lining the blood vessels. In arteries, the endothelium is typically thicker than in veins due to the greater mechanical stress and the need for more robust support against high blood pressure. This structural adaptation helps arteries maintain their integrity and function effectively under varying pressure conditions.