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

8. Joints

Introduction to Joints

Anatomy & Physiology

8. Joints

Introduction to Joints

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2:33 minutes

Problem 22

Textbook Question

How does a meniscus (articular disc) function in a joint?

Verified step by step guidance

Understand the anatomy of a meniscus: The meniscus is a crescent-shaped fibrocartilaginous structure found in certain synovial joints, such as the knee. It is composed of dense connective tissue and is designed to withstand compressive forces.

Learn the primary function of the meniscus: The meniscus acts as a shock absorber, distributing the load across the joint surface to reduce stress on the articular cartilage and underlying bone.

Explore its role in joint stability: The meniscus helps stabilize the joint by deepening the articular surface, which improves the congruency between the articulating bones and reduces the risk of dislocation.

Understand its role in lubrication and nutrition: The meniscus aids in the distribution of synovial fluid, which lubricates the joint and provides nutrients to the avascular articular cartilage.

Recognize its role in proprioception: The meniscus contains mechanoreceptors that contribute to proprioception, helping the body sense the position and movement of the joint, which is crucial for coordinated movement.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Meniscus Structure

The meniscus is a crescent-shaped cartilage structure located in certain joints, such as the knee. It serves to deepen the joint socket, providing stability and improving the fit between the articulating bones. This structure is crucial for distributing weight and reducing friction during movement.

Joint Function

Joints are the connections between bones that allow for movement and flexibility. The meniscus plays a vital role in joint function by absorbing shock and providing cushioning, which helps to protect the bones from wear and tear. This function is essential for maintaining joint health and mobility.

Load Distribution

Load distribution refers to how forces are spread across a joint during activities such as walking or running. The meniscus aids in evenly distributing these forces across the joint surface, which minimizes stress on any single area. This function is critical for preventing injuries and ensuring the longevity of the joint.