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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

Cardiac Cycle

Anatomy & Physiology

18. The Heart

Cardiac Cycle

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Multiple Choice

During which phase of the cardiac cycle is the heart filled with blood?

Diastole

Atrial systole

Ventricular systole

Isovolumetric contraction

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Verified step by step guidance

Understand the cardiac cycle, which consists of two main phases: systole and diastole.

Recognize that during diastole, the heart muscle relaxes, allowing the chambers to fill with blood.

Identify that atrial systole refers to the contraction of the atria, pushing blood into the ventricles, not the filling phase.

Note that ventricular systole involves the contraction of the ventricles to pump blood out of the heart, not the filling phase.

Understand that isovolumetric contraction is a part of ventricular systole where the ventricles contract with no volume change, as all valves are closed, and does not involve filling with blood.