Joints

Question 1

What is a joint?

Answer 1

Union/junction of 2+ bones

Question 2

Arthro

Answer 2

Joints

Question 3

3 Joint Types

Answer 3

Based on structure and material
1. Fibrous
2. Cartilaginous
3. Synovial

Question 4

Fibrous joints

Answer 4

Held by fibrous tissue
- Virtually no movement
- Often ossify with age (fibrous joint only in young age)
eg. suture between skull bones

Question 5

Cartilaginous joint

Answer 5

Held by cartilage
- Rocking/gliding movement
eg. mandibular symphysis, pubic symphysis, intervertebral disks

Question 6

Synovial joint (diarthrodial)

Answer 6

What we typically think of ‘joints’
- Freely movable
- Made of articular (hyaline) cartilage, joint cavity, joint capsule, and ligaments

Question 7

Articular cartilage

Answer 7

Covers ends of bones
Extremely smooth and cushioning
Purpose: reduce friction

Question 8

Joint cavity

Answer 8

Space within the joint that has synovial fluid

Question 9

Joint capsule

Answer 9

2 layers: outer fibrous tissue, inner synovial membrane that makes fluid

Synovial fluid is transparent, nourishes and lubricates joint

Question 10

Ligaments

Answer 10

Connect bone to bone.
Intracapsular (within capsule)
Extracaspular (outside capsule or forming part of the joint capsule)