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BIOB34H3 Lecture Notes - Hyaline Cartilage, Cartilaginous Joint, Synovial Fluid

Biological Sciences
Course Code
Ted Petit

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Chapter 9 Joints
Structural Classification
- Based on whether there is a joint cavity and the type of CT
1. fibrous joint
a. no cavity
b. fibrous CT holds bones together
2. cartilaginous joint
a. no cavity
b. cartilage holds bones together
3. synovial joint
a. has synovial cavity
b. articular capsule and ligaments hold bones together
Functional Classification
- Based on movement allowed
1. synarthroses are immovable
2. amphiarthroses are partially movable
3. diarthroses are freely movable
Fibrous Joints
- Sutures
1. in skull
a. dense fibrous CT
b. functionally synarthrotic
2. other sutures (synostoses)
a. complete fusion of bone
b. functionally synarthrotic
- Syndesmoses
1. more CT than a suture (longer fibers)
2. dense regular CT forms ligament or interosseous membrane
3. functionally amphiarthrotic (depends on length of fibers)
- Gomphoses
1. peg fits into a socket
2. functionally synarthrotic
Cartilaginous Joints
- Synchondroses
1. hyaline cartilage
2. epiphyseal plate is functionally synarthrosis, later becomes synostosis
3. sternum and rib 1 is synarthrosis
- Symphyses
1. fibrocartilage
2. functionally amphiarthrotic
Synovial Joints
- Basic structure
1. ends of bones covered with articular cartilage (hyaline), which reduces friction and absorbs
2. joint surrounded by articular capsule
a. fibrous capsule is outer layer
1) mostly dense irregular CT
2) helps stabilize joint
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