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

25. The Urinary System

Introduction to the Urinary System

Anatomy & Physiology

25. The Urinary System

Introduction to the Urinary System

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Multiple Choice

Which folds disappear as the urinary bladder fills with urine?

Trabeculae

Villi

Plicae circulares

Rugae

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Verified step by step guidance

Understand the anatomy of the urinary bladder: The urinary bladder is a hollow organ that stores urine. Its inner lining is composed of transitional epithelium, which allows it to stretch as it fills with urine.

Learn about rugae: Rugae are folds in the mucosal lining of the bladder. These folds are present when the bladder is empty and allow the bladder to expand as it fills with urine.

Compare rugae to other structures mentioned: Trabeculae are connective tissue structures found in organs like the spleen or bone, not the bladder. Villi are finger-like projections found in the small intestine to increase surface area for absorption. Plicae circulares are circular folds in the small intestine, also for absorption. None of these are related to the bladder's ability to stretch.

Recognize the function of rugae: As the bladder fills with urine, the rugae flatten out to accommodate the increased volume, effectively disappearing as the bladder expands.

Conclude that rugae are the correct answer: The disappearance of rugae is a key feature of the bladder's ability to stretch and store urine.