Questions and Answers
What are the three functional classifications of joints based on their mobility?
What are synarthrotic joints?
Immovable joints
Provide an example of a synarthrotic joint.
Suture
What does amphiarthrotic joints refer to?
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What is another name for diarthrotic joints?
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Name a function of diarthrotic or synovial joints.
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What is the role of synovial fluid in diarthrotic joints?
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What are menisci?
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What is the function of ligaments?
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What is a bursa?
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Study Notes
Functional Classification of Joints
- Joints are classified based on movement:
- Synarthrotic: Immovable joints
- Amphiarthrotic: Slightly movable joints
- Diarthrotic: Freely movable joints; most movement occurs in appendicular skeleton and includes all synovial joints.
Synarthrotic Joints
- Suture: Connects bones of the skull, allows no movement.
- Gomphosis: Connects teeth to the jaw, also immovable.
Amphiarthrotic Joints
- Syndesmosis: Joins two bones, such as the tibia and fibula or the ulna and radius.
- Symphysis: A joint connected by a pad of fibrous cartilage, slightly movable, found between pubic bones and adjacent vertebral bodies.
Diarthrotic Joints
- Also known as synovial joints, characterized by a high degree of movement.
Functions of Diarthrotic / Synovial Joints
- Specialized design for enhanced mobility.
- Complex structure with a joint capsule (articular capsule) composed of:
- Fibrous Membrane
- Synovial Membrane
- Contains a joint cavity filled with synovial fluid that:
- Provides lubrication for smooth movement
- Nourishes chondrocytes (cartilage cells)
- Acts as a shock absorber during activity.
- Articular Cartilage: Hyaline cartilage covering the ends of bones, facilitating movement.
Menisci
- Refers to articular discs that provide cushioning and stability in joints.
Ligaments
- Tough, dense regular connective tissue that connects bone to bone, providing joint stability.
Bursa
- Small, fluid-filled pockets formed in areas where tendons or ligaments may rub against other tissues, helping to reduce friction.
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Description
This quiz covers the functional classifications of joints based on their mobility, exploring synarthrotic, amphiarthrotic, and diarthrotic types. Ideal for students studying anatomy, it provides definitions and examples of various joint types. Test your knowledge of joint movement!
