Bones & joints

Question 1

What are the 3 classifications/structures of joints?

Answer 1

Fibrous (structural), synovial, cartilaginous

Question 2

Fibrous joints:

Answer 2

Synarthroses–> immovable joints

EX: sutures

Question 3

Cartilaginous joints:

Answer 3

Amphiarthrosis –> (amphi= both) both slightly movable and immovable joints
EX: pubic symphysis (immovable) and intervertebral joints (slightly movable)

Question 4

Synovial joints:

Answer 4

Diarthrosis –> freely movable

Question 5

Synovial joint type: plane joint

Answer 5

AKA: gliding joints
EX: carpals
-nonaxial

Question 6

Synovial joint type: hinge joint

Answer 6

EX: proximal articulation with humerus and ulna.. inter phalangeal joints (fingers and toes)
-uniaxial

Question 7

Synovial joint type: pivot joint

Answer 7

EX: joint between atlas and axis.. proximal articulation of radius and ulna
-uniaxial

Question 8

Synovial joint type: condyloid joint

Answer 8

EX: radius/ulna/carpals and Knuckles

-biaxial

Question 9

Synovial joint type: saddle joint

Answer 9

EX: Carpal articulation with metacarpal 1

-biaxial

Question 10

Synovial joint type: ball and socket joint

Answer 10

EX: where humerus and scapula articulate

-multiaxial

Question 11

Synovial joint features

Answer 11

• synovial fluid is found in the joint cavity
• every synovial joint has hyaline cartilage in ends of bones
• ligaments reinforce joints
• Joint surfaces are enclosed by a fibrous articular capsule
• joint cavities filled with synovial fluid
• Bursae: flattened fibrous sacks lined with synovial fluid

Question 12

Syndesmosis

Answer 12

In open space between ulna and radius