Articulations Flashcards
Articulation
Where two bones meet.
A joint
Types of joints (2 types)
1) synarthroses
2) ampiarthroses
3) Diarthorses
Synarthroses definition
Joint that has no movement at all
Divided into 4 types
Synarthroses types
1) synostosis
2) Suture
3) gomphosis
4) synchondrosis
Synostosis definition
2 bones fuse into one bone
Synostosis example
2 frontal bones fused into 1
Adult sacrum
Suture definition
2 bones held together by very short, connective tissue fibers
Suture example
Sagittal suture
Gomphosis definition and example
The root of the tooth held together by a periodontal ligament in the alveolus
Synchondrosis
Rigid bridge of hyaline cartilage that connects two bones
Synchondrosis example
Between ribs 1 and 2 and the sternum
Amphiarthroses definition
Permits a slight amount of movement
2 types
Types of amphiarthroses
1) symphysis
2) syndesmosis
Symphysis
2 bones joined together with a pad of fibrocartilafe
Symphysis examples
Pubic symphysis
Between adjacent vertebra (intervertebral disc)
Symphysis purpose
Cushions bones and spaces bones properly
Syndesmosis definition and purpose
Long, fibrous ligament that holds 2 bones together so that they don’t separate
Syndesmosis example
Between radius and ulna of forearm
Diarthroses
Freely moving joints
All diarthroses contain (three things)
1) joint capsule
2) tendon
3) ligament
Joint capsule
Periosteum of one bone forms sleeve across joint to next bone
Tendon
Connective tissue that anchors a muscle from one bone onto the next bone’s periosteum
Ligament
Connective tissue that hold adjacent bones together
Diarthroses may contain these things (4 things) :
1) Synovial membrane
2) bursa
3) tendon sheath
4) meniscus
Synovial membrane
Membrane that lines inside of joint capsule
Produced synovial fluid
Synovial fluid
Clear fluid that lubricates the joint
Distributes nutrients throughout
Bursa
Synovial Fluid-filled pocket that cushion joints
Tendon sheath
Tubular bursa that surrounds a tendon, blood vessel, and nerves
Meniscus
A pad of fibrocartilage that cushions joint