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

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which component of the electrical conduction system of the heart is most responsible for the synchronized contraction of cardiac muscle tissue?

Bundle of His

Sinoatrial (SA) node

Purkinje fibers

Atrioventricular (AV) node

Previous problemNext problem

Verified step by step guidance

Begin by understanding the role of the electrical conduction system in the heart, which is responsible for initiating and coordinating the contraction of cardiac muscle tissue.

Identify the key components of the heart's conduction system: the Sinoatrial (SA) node, Atrioventricular (AV) node, Bundle of His, and Purkinje fibers.

Recognize that the Sinoatrial (SA) node is known as the heart's natural pacemaker. It initiates the electrical impulse that triggers the heartbeat, setting the rhythm for the entire heart.

Understand that the SA node's impulse causes the atria to contract, and this impulse is then transmitted to the Atrioventricular (AV) node, which acts as a gatekeeper, delaying the impulse before it passes to the ventricles.

Learn that the synchronized contraction of cardiac muscle tissue is primarily initiated by the SA node, as it sets the pace and rhythm for the heart, ensuring that the atria contract first, followed by the ventricles.