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

Joint Movements

Anatomy & Physiology

8. Joints

Joint Movements

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4:07 minutes

Problem 2

Textbook Question

Freely movable joints are:
a. synarthroses
b. diarthroses
c. amphiarthroses.

Verified step by step guidance

Understand the classification of joints based on their movement capabilities. Joints are categorized into three main types: synarthroses (immovable), amphiarthroses (slightly movable), and diarthroses (freely movable).

Focus on the term 'freely movable joints' mentioned in the problem. This corresponds to the type of joint that allows a wide range of motion, such as in the shoulder or hip.

Recall that diarthroses are also known as synovial joints. These joints are characterized by the presence of a synovial cavity filled with synovial fluid, which reduces friction and facilitates movement.

Examples of diarthroses include ball-and-socket joints (e.g., shoulder and hip), hinge joints (e.g., elbow and knee), and pivot joints (e.g., neck). These joints allow movements such as flexion, extension, rotation, and circumduction.

Review the options provided in the problem: a. synarthroses (immovable), b. diarthroses (freely movable), c. amphiarthroses (slightly movable). Based on the explanation, identify the correct answer as diarthroses.

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Key Concepts

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

Joint Classification

Joints in the human body are classified based on their mobility and structure. The three main types are synarthroses (immovable joints), amphiarthroses (slightly movable joints), and diarthroses (freely movable joints). Understanding these classifications is essential for identifying the type of joint in question.

Diarthroses

Diarthroses are a category of joints characterized by their ability to move freely in various directions. They are also known as synovial joints and include structures like the knee, elbow, and shoulder. This type of joint is crucial for a wide range of movements and activities in the body.

Synovial Fluid

Synovial fluid is a viscous liquid found in the cavities of synovial joints, which serves to lubricate and nourish the cartilage covering the ends of bones. This fluid reduces friction during movement and plays a vital role in joint health, making it an important aspect of diarthroses.