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?

Carpometacarpal joint of the thumb

Elbow joint

Shoulder joint

Knee joint

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Verified step by step guidance

Step 1: Understand the concept of a saddle joint. A saddle joint is a type of synovial joint where the articulating surfaces are shaped like a saddle, with one surface concave and the other convex. This allows movement in two planes: flexion/extension and abduction/adduction.

Step 2: Review the anatomy of the carpometacarpal joint of the thumb. This joint is a classic example of a saddle joint, as it allows the thumb to move in multiple directions, including opposition, which is unique to humans and some primates.

Step 3: Compare the other options provided in the question. The elbow joint is a hinge joint, allowing movement primarily in one plane (flexion and extension). The shoulder joint is a ball-and-socket joint, allowing movement in multiple planes. The knee joint is a modified hinge joint, primarily allowing flexion and extension with slight rotation.

Step 4: Identify the correct answer based on the anatomical classification of joints. The carpometacarpal joint of the thumb fits the description of a saddle joint, while the other options do not match this classification.

Step 5: Conclude that the correct answer is the carpometacarpal joint of the thumb, as it is the only example of a saddle joint among the options provided.