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

Structural Class: Synovial Joints

Anatomy & Physiology

8. Joints

Structural Class: Synovial Joints

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Problem L2.1c

Textbook Question

Explain how the structure of each of the following joint types follows its function.
Synovial joint

Verified step by step guidance

Understand the basic structure of synovial joints: Synovial joints are characterized by the presence of a synovial cavity filled with synovial fluid, which reduces friction and allows for smooth movement between articulating bones.

Examine the role of articular cartilage: The ends of the bones in synovial joints are covered with articular cartilage, a smooth and resilient tissue that absorbs shock and reduces friction during movement.

Analyze the function of the joint capsule: The joint capsule is a tough, fibrous structure that encloses the synovial cavity and provides stability to the joint while allowing for mobility.

Explore the importance of ligaments: Ligaments are strong bands of connective tissue that reinforce the joint capsule and help stabilize the joint by preventing excessive movement.

Consider the role of accessory structures: Synovial joints often include additional structures such as bursae (fluid-filled sacs) and menisci (cartilage pads) that further reduce friction, distribute weight, and enhance joint function.

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Key Concepts

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

Synovial Joint Structure

Synovial joints are characterized by a fluid-filled joint cavity, which allows for a wide range of motion. They consist of articular cartilage covering the ends of bones, a synovial membrane that secretes synovial fluid for lubrication, and ligaments that provide stability. This structure enables flexibility and movement while minimizing friction during activities.

Function of Synovial Joints

The primary function of synovial joints is to facilitate movement between bones while providing stability. They allow for various types of motion, including flexion, extension, rotation, and gliding, depending on the specific joint type (e.g., hinge, ball-and-socket). This functional versatility is essential for activities ranging from walking to throwing.

Biomechanics of Joint Movement

Biomechanics involves the study of the mechanical laws relating to the movement or structure of living organisms. In the context of synovial joints, it examines how forces are applied during movement and how the joint's structure supports these forces. Understanding biomechanics helps explain how joint design optimizes function and reduces the risk of injury.

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Related Practice

Multiple Choice

Which of the following statements accurately describes weeping lubrication in synovial joints?

What role does articular cartilage play in synovial joints?

Imagine you're a doctor and a patient comes to you because of pain in their knee joint. You find that there is not enough synovial fluid present in their knee's synovial cavity, leading to friction when the knee moves. Which of the following structures in the knee joint is not functioning correctly?

Which of the following is not a function of articulations?

a. Movement

b. Blood cell formation

c. Stability

d. Providing growth in length for long bones

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