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

2. Cell Chemistry & Cell Components

Introduction to Eukaryotic Organelles

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Eukaryotic Organelles

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Multiple Choice

Which of the following statements accurately describes lymphatic capillaries?

They are open-ended vessels consisting of loosely overlapping endothelial cells.

They are continuous tubes with no gaps between their endothelial cells.

They are part of the circulatory system and transport red blood cells.

They are closed-ended vessels lined with tightly joined epithelial cells.

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Verified step by step guidance

Understand the structure and function of lymphatic capillaries: Lymphatic capillaries are small, thin-walled vessels that are part of the lymphatic system. Their primary role is to collect excess interstitial fluid and transport it as lymph back to the circulatory system.

Analyze the structural characteristics of lymphatic capillaries: They are closed-ended vessels, meaning they do not form a continuous loop like blood vessels. Their walls consist of loosely overlapping endothelial cells, which allow fluid, proteins, and other substances to enter the capillaries easily.

Compare the options provided: Evaluate each statement based on the known anatomy and physiology of lymphatic capillaries. For example, they are not open-ended vessels, nor do they transport red blood cells, as these are functions of the circulatory system.

Clarify the role of endothelial cells: The loosely overlapping endothelial cells in lymphatic capillaries act as one-way valves, permitting the entry of interstitial fluid while preventing its backflow. This is a key feature distinguishing them from blood capillaries.

Select the correct description: Based on the analysis, the accurate statement is that lymphatic capillaries are closed-ended vessels consisting of loosely overlapping endothelial cells, which facilitate their function in the lymphatic system.