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

The joint at the base of the thumb is an example of a(n) __________ joint.

saddle

gliding

pivot

ellipsoidal

hinge

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Verified step by step guidance

Begin by understanding the types of synovial joints. Synovial joints are classified based on the shapes of the articulating surfaces and the types of movement they allow.

Review the characteristics of each type of joint mentioned in the problem: saddle, gliding, pivot, ellipsoidal, and hinge.

Saddle joints are characterized by articulating surfaces that are concave in one direction and convex in the other, resembling a saddle. This allows for movement in two planes, such as flexion-extension and abduction-adduction.

Consider the anatomy of the thumb. The joint at the base of the thumb, known as the carpometacarpal joint, allows for a wide range of movements including opposition, which is crucial for grasping objects.

Identify the joint type that matches the description of the thumb's carpometacarpal joint. Given its ability to move in multiple directions and perform opposition, the saddle joint is the correct classification.