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

Classification of Joints

Anatomy & Physiology

8. Joints

Classification of Joints

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Multiple Choice

Which of the following is an example of a saddle joint?

Hip joint

Elbow joint

Knee joint

Thumb carpometacarpal joint

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Verified step by step guidance

Understand the types of synovial joints: Synovial joints are classified into several types based on their shapes and the movements they allow. These include hinge, pivot, ball-and-socket, saddle, condyloid, and plane joints.

Identify the characteristics of a saddle joint: Saddle joints are biaxial joints that allow movement in two planes. They are characterized by concave and convex surfaces that resemble a saddle, allowing for flexion, extension, abduction, adduction, and circumduction.

Examine the anatomy of the thumb carpometacarpal joint: The thumb carpometacarpal joint is located at the base of the thumb, where the first metacarpal bone meets the trapezium bone of the wrist. This joint is a classic example of a saddle joint.

Compare the thumb carpometacarpal joint with other joint types: The hip joint is a ball-and-socket joint, allowing for a wide range of movement. The elbow joint is a hinge joint, primarily allowing flexion and extension. The knee joint is also a hinge joint, with some rotational movement.

Conclude why the thumb carpometacarpal joint is the correct answer: Given its unique saddle shape and the range of movements it allows, the thumb carpometacarpal joint fits the definition of a saddle joint, unlike the other options provided.