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

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

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Multiple Choice

What are the flaps on the front of the atria called?

Valves

Papillae

Ventricles

Auricles

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Verified step by step guidance

Understand the anatomy of the heart: The heart is divided into four chambers—two atria (upper chambers) and two ventricles (lower chambers). The atria receive blood, while the ventricles pump blood out of the heart.

Learn the structure of the atria: The atria have small, ear-like flaps on their anterior surface. These flaps are extensions of the atrial walls and are called auricles.

Clarify the function of auricles: Auricles increase the capacity of the atria, allowing them to hold more blood when needed.

Differentiate auricles from other structures: Valves regulate blood flow between chambers, papillae are small projections found in other parts of the body (not the heart), and ventricles are the lower chambers of the heart responsible for pumping blood.

Conclude that the correct term for the flaps on the front of the atria is 'auricles,' as they are unique to the atria and serve a specific function in increasing blood-holding capacity.