Chapter 8 Joints Flashcards
1
Q
Articulations
A
- aka joints
- junctions between bones
- don’t break joints
- functions:
- Bind parts of the skeletal system together
- Make bone growth possible.
- Permits parts of the skeleton to change shape during childbirth – yay!
- Enable body to move in response to skeletal muscle contractions
- Muscle has to cross joint in order to act on the joint
2
Q
Classification of Joints
A
Fibrous, Cartilaginous, Synovial
3
Q
Fibrous Joints
A
- Connected by dense CT
- Many collagenous fibers
- Between bones in close contact
- Syndesmosis, Suture, Gomphosis
4
Q
Syndesmosis
A
- Long fibers connect bones
- Amphiarthrotic (slightly movable)
- Distal ends of tibia and fibula
5
Q
Suture
A
- Between flat bones of skull
- Synarthrotic (immovable)
- Thin layer of CT connects bones
- Fontanels allow the skull to change shape slightly during birth
6
Q
Gomphosis
A
- Cone-shaped bony process in a socket
- Tooth in jawbone, attached by the periodontal ligament
- Synarthrotic (immovable)
7
Q
Cartilaginous Joints
A
Held together by hyaline cartilage or fibrocartilage
- Synchondrosis and Symphysis
8
Q
Synchondrosis
A
- Bands of hyaline cartilage unite bones
- Many are temporary structures & disappear
- Ex. Epiphyseal plate
- Between manubrium and first rib
- Synarthrotic (immovable)
9
Q
Symphysis
A
- The articular surface is covered with a thin layer of hyaline cartilage and that is attached to a pad of fibrocartilage between bones:
- Ex. Pubis symphysis
- Joint between bodies of the vertebrae
- Amphiarthrotic – slightly movable
10
Q
Synovial Joints
A
- Most complex
- Allow free movement
- Consist of articular cartilage, a joint capsule (what pops when you pop your knuckles), & synovial membrane
11
Q
Joints are grouped by the degree of movement possible at the junction
A
- Synarthrotic: immovable (head)
- Amphiarthrotic: slightly movable
- Diarthrotic: feely moveable
