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

17. The Blood

Introduction To Blood

Anatomy & Physiology

17. The Blood

Introduction To Blood

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Multiple Choice

What structure prevents the backflow of blood during circulation in the heart?

Heart valves

Chordae tendineae

Purkinje fibers

Coronary arteries

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Verified step by step guidance

Understand the basic function of the heart in the circulatory system, which is to pump blood throughout the body, ensuring that oxygenated blood reaches tissues and deoxygenated blood returns to the lungs.

Identify the key structures within the heart that are involved in directing blood flow. These include the atria, ventricles, and the valves.

Learn about the four main heart valves: the tricuspid valve, the pulmonary valve, the mitral valve, and the aortic valve. These valves open and close to regulate blood flow and prevent backflow.

Recognize that the primary function of heart valves is to prevent the backflow of blood. They ensure that blood flows in a unidirectional manner from the atria to the ventricles and from the ventricles to the major arteries.

Differentiate between the roles of other structures mentioned: Chordae tendineae anchor the heart valves, Purkinje fibers are involved in conducting electrical impulses, and coronary arteries supply blood to the heart muscle itself.