Questions and Answers
What is the functional classification of joints based on?
Which of the following is a type of fibrous joint?
What are the three types of fibrous joints?
Syndesmoses, sutures, gomphoses
What type of joint is a synchondrosis?
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What is the main characteristic of synovial joints?
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Name one distinguishing feature of synovial joints.
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Which joint type allows biplanar motion?
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What type of joint is a ball and socket joint?
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An example of a hinge joint is the ______.
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Match the following joint types with their characteristics:
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Study Notes
Functional Classification of Joints
- Synarthroses: immovable joints that offer no movement.
- Amphiarthroses: slightly movable joints, allowing limited motion.
- Diarthroses: freely movable joints enabling a wide range of movement.
Structural Classification of Joints
- Joints classified by binding material and presence of a joint cavity.
- Types:
- Fibrous joints: no joint cavity, connected by fibrous tissue.
- Cartilaginous joints: connected by cartilage without a joint cavity.
- Synovial joints: have a joint cavity filled with synovial fluid.
Fibrous Joints
- Characterized as immovable or synarthroidal joints.
- Types include:
- Syndesmoses: slightly movable joints connected by ligaments.
- Sutures: immovable joints, primarily found in the skull.
- Gomphoses: peg-in-socket joints, such as the connections of teeth.
Syndesmoses
- Type of fibrous joint that allows slight movement.
- Example includes the tibiofibular joint.
Suture
- A fibrous joint that is essentially immobile.
- Commonly found in cranial sutures, connecting skull bones.
Gomphosis
- A unique peg-in-socket fibrous joint seen in teeth.
Cartilaginous Joints
- Bones connected by cartilage with no joint cavity.
- Generally not highly mobile.
- Types include:
- Synchondroses: joints with hyaline cartilage, often synarthrotic.
- Symphysis: joints where fibrocartilage unites two bony surfaces.
Synchondrosis
- A type of cartilaginous joint where hyaline cartilage connects bony surfaces.
- Examples include the epiphyseal growth plate and the rib-sternum connection.
Symphysis
- Cartilaginous joint formed with fibrocartilage.
- Examples are the pubic symphysis and joints between vertebrae.
Synovial Joints
- Freely movable joints (diarthrodial) that have a fluid-filled cavity.
- Include joints of the limbs facilitating extensive movement.
5 Distinguishing Features of Synovial Joints
- Articulate cartilage: cushions and prevents bone ends from crushing.
- Joint cavity: a small space that contains synovial fluid.
- Synovial membrane: lines the joint cavity and secretes synovial fluid.
- Joint capsule: outer fibrous layer composed of dense irregular CT, inner layer is loose CT.
- Synovial fluid: lubricates joints, nourishes cartilage, and removes debris.
Plane Joint
- Synovial joint allowing gliding or sliding motions.
- Formed between two flat surfaces, exemplified by the AC joint.
Hinge Joint
- Synovial joint facilitating uniplanar motion, particularly flexion and extension.
- Notable example: elbow joint (Humero-ulnar joint).
Modified Hinge Joint
- Type of synovial joint allowing flexion, extension, and rotation.
- Example includes the knee joint.
Pivot Joint
- Synovial joint that allows uniplanar rotation.
- Permits spinning motion; examples are the atlantoaxial joint and proximal radio-ulnar joint.
Condyloid Joint
- Synovial joint shaped like an egg, allowing biplanar motion.
- Enables flexion, extension, abduction, adduction, and axial rotation; observed in MCP joints (knuckles).
Saddle (Sellar) Joint
- Provides biplanar motion with movements in two different planes.
- Example: CMC joint of the thumb.
Ball and Socket Joint
- Synovial joint with the capacity for triplanar motion.
- Allows movements like flexion, extension, abduction, adduction, and rotations; represented by the glenohumeral joint (shoulder).
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Description
Explore the various classifications of joints in this quiz. Learn about immovable, slightly movable, and freely movable joints, as well as the structural types such as fibrous, cartilaginous, and synovial joints. Assess your knowledge of their characteristics and functions.
