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

4. Tissues & Histology

Introduction to Muscle Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Muscle Tissue

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Multiple Choice

Which of the following structures tightly join cardiac muscle fibers to neighboring fibers?

Intercalated discs

Sarcomeres

Ligaments

Tendons

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Understand the structure and function of cardiac muscle fibers. Cardiac muscle fibers are specialized muscle cells found in the heart, responsible for the rhythmic contraction and relaxation that pumps blood throughout the body.

Identify the unique features of cardiac muscle fibers. Unlike skeletal muscle fibers, cardiac muscle fibers are branched and interconnected, allowing for coordinated contraction.

Learn about intercalated discs. Intercalated discs are specialized structures found between cardiac muscle fibers. They contain gap junctions and desmosomes, which facilitate electrical and mechanical coupling between the fibers.

Explore the role of intercalated discs. These discs ensure that cardiac muscle fibers contract in a synchronized manner, which is crucial for effective heart function.

Differentiate between the options provided. Sarcomeres are the contractile units within muscle fibers, ligaments connect bones to other bones, and tendons connect muscles to bones. Intercalated discs are the correct structures that tightly join cardiac muscle fibers to neighboring fibers.