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

Which structures coordinate contraction in cardiac muscle cells within the electrical conduction system of the heart?

Chordae tendineae

Coronary arteries

Sinoatrial node

Atrioventricular valves

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Verified step by step guidance

Understand the role of the electrical conduction system in the heart, which is responsible for initiating and coordinating the contraction of cardiac muscle cells.

Identify the key components of the heart's electrical conduction system, including the sinoatrial (SA) node, atrioventricular (AV) node, bundle of His, and Purkinje fibers.

Recognize that the sinoatrial node, often referred to as the heart's natural pacemaker, is responsible for generating electrical impulses that initiate the contraction of the heart muscle.

Learn how the electrical impulse from the sinoatrial node travels through the atria, causing them to contract, and then reaches the atrioventricular node, which delays the impulse before it passes to the ventricles.

Differentiate between the sinoatrial node and other structures mentioned, such as chordae tendineae, coronary arteries, and atrioventricular valves, which have different functions unrelated to the coordination of cardiac muscle contraction.