Articulations - Chapter 9 Flashcards
A place of contact where:
- a bone meets another bone
- a bone meets the cartilage
- a bone meets teeth
is called a what?
an articulation/joint
What is mobility?
varies from immobile to wide range of motions
Increasing stability of a bone does what to mobility?
decreases mobility
What are the 3 anatomical classification of joints?
Fibrous, cartilaginous, synovial
Bones are held together by what in fibrous joints?
collagen fibers
Bones are held together by what in cartilaginous joints?
cartilage
What is a synovial joint?
synovial cavity, separates bone by fluid
What are the 3 physiological classification of joint
Synarthroses, amphiarthroses, diarthroses
What are synarthroses?
immobile joints
synarthroses are how stable amongst the 3?
the most stable
What are amphiarthroses?
slightly mobile joints
What are diarthroses?
Freely mobile joints
What are 3 specific types of fibrous joints?
Gomphoses, sutures, and syndesmoses
Where are Gomphoses located?
teeth of the mandible and mandible
Where are sutures located?
between skull bones
Where are syndesmoses located?
between parallel bones
Functionally, gomphoses and sutures are classified as what?
synarthroses
Syndesmoses are classified as what?
amphiarthroses
The 2 types of cartilaginous joints
synchondroses and symphyses
Synchondroses join the bones by
hyaline cartilage
Symphyses join the bones by
pad of fibrocartilage
Where are synovial joints located on the bone?
cover ends of bones by articular cartilage
what is the function of synovial joints?
reduce friction and absorb shock
The articular capsule of the synovial joint has 2 layers, what are the layers?
- outer fibrous layer, made of dense regular connective tissue
- inner synovial membrane, secretes synovial fluid
What is the function of the articular cartilage of the synovial joint?
prevent bone to bone contact during compression of joint
What are the articular discs of the synovial joint?
pads of fibrocartilage between articular surfaces
The articular discs are also called?
menisci
What are the functions of the articular discs?
divide joint into 2 spaces, allow movement in different spaces, provide stability, and allow bone to fit together better
What do ligaments connect?
bone to bone