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

18. The Heart

Electrical Conduction System of the Heart

Anatomy & Physiology

18. The Heart

Electrical Conduction System of the Heart

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Multiple Choice

Where in the heart is the sinoatrial node located?

In the left ventricle

In the right atrium

In the right ventricle

In the left atrium

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Verified step by step guidance

Understand the role of the sinoatrial (SA) node: It is the heart's natural pacemaker, responsible for initiating the electrical impulses that set the rhythm for the heart's contractions.

Identify the location of the SA node: The SA node is located in the right atrium of the heart. This is important because the right atrium is where the electrical impulse begins before spreading to the rest of the heart.

Visualize the heart's anatomy: The heart has four chambers - two atria (right and left) and two ventricles (right and left). The SA node is situated in the upper part of the right atrium near the entrance of the superior vena cava.

Consider the function of the right atrium: The right atrium receives deoxygenated blood from the body and pumps it into the right ventricle, which then sends it to the lungs for oxygenation. The SA node's location here is strategic for initiating the heartbeat.

Review the options given: The correct answer is 'In the right atrium,' as this is the anatomical location of the sinoatrial node, which is crucial for the heart's electrical conduction system.