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

Which of the following correctly labels the pathway for the cardiac conduction system?

Bundle of His → SA node → AV node → Purkinje fibers

Purkinje fibers → Bundle of His → SA node → AV node

Atrioventricular (AV) node → Sinoatrial (SA) node → Purkinje fibers → Bundle of His

Sinoatrial (SA) node → Atrioventricular (AV) node → Bundle of His → Purkinje fibers

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Verified step by step guidance

Step 1: Understand the cardiac conduction system, which is responsible for initiating and propagating electrical impulses that control the heartbeat.

Step 2: Learn the sequence of structures involved in the conduction pathway: the Sinoatrial (SA) node, Atrioventricular (AV) node, Bundle of His, and Purkinje fibers.

Step 3: Recognize the role of each structure: the SA node acts as the pacemaker, the AV node delays the impulse to allow ventricular filling, the Bundle of His transmits the impulse to the ventricles, and the Purkinje fibers distribute the impulse throughout the ventricular walls.

Step 4: Compare the given options to the correct sequence: Sinoatrial (SA) node → Atrioventricular (AV) node → Bundle of His → Purkinje fibers.

Step 5: Eliminate incorrect options by identifying deviations from the correct sequence and confirm the correct pathway based on the physiological roles of the structures.