overview of joints Flashcards
what are joints also known as
articulation
functional classification of joints
- synarthrosis
- amphiarthrosis
- diarthrosis
structural classification of joints
- fibrous
- cartilaginous
- synovial
describe the synarthrosis joint
- fixed and immovable
- tough fibrous tissue
- edges may be dovetailed together
describe the amphiarthrosis joint
-slightly movable
- pad of cartilages lie between bone surfaces and act as shock absorbers
- fibrous capsule holds bone in place
describe the diarthrosis joint
- freely moving joints with synovial fluid in them
- movement can be restricted by ligaments or shape of articulating surfaces
describe the fibrous joint
- bones held together by fibrous connective tissue rich in collagen fibres
- permit little or no movement
3 types of fibrous joints
- suture
- syndesmosis
- interosseous membrane
describe the cartilaginous joint
- piece of cartilage between bones that holds them together to make a joint
- they lack a synovial cavity
- little or no movement
what are the two types of cartilaginous joints
- synchondrosis
- symphysis
describe the synovial joint
- joint found between bones that move against each other (synovial cavity)
- filled with lubricant synovial fluid
- freely movable
what are the two characteristics of synovial joints
- articular cartilage
- articular capsule
articular cartilage
bones covered by layer of hyaline cartilage
articular capsule
surrounds synovial joint like a sleeve and encloses synovial cavity
- outer fibrous capsule
- inner synovial membrane
what is synovial fluid
- viscous clear pale yellow fluid
- forms thin film over surfaces within articular capsule
- lubricates the joint to reduce friction
- supplies o2 and nutrients