Joints of the Thoracic Limb

Question 1

Fibrous joints (synarthroses)

Answer 1

Bones held together by thin layer of dense fibrous connective tissue, immovable, ex. between bones of the skull

Question 2

3 types of slightly moveable joints (amphiarthrosis)

Answer 2

Syndesmosis, synchondrosis, symphysis

Question 3

Syndesmosis

Answer 3

Occurs when two bones join by a section of cartilage, ex. betweeen tibia and fibula

Question 4

Synchondrosis

Answer 4

Union between two bones formed by hyaline cartilage ex. sternocostal joint, where ribs meet sternum

Question 5

Symphysis

Answer 5

Each vertebrae is divided by a cartilaginous joint, provides cushion , ex. between pubic vertebrae

Question 6

4 types of free moveable joints (diarthrosis)

Answer 6

Ball and socket, hinge, plane/gliding, pivot (all synovial)

Question 7

Ball and socket joint

Answer 7

Encapsulated, fluid, cartilage on contact surface, allows rotation and can move in all planes, ex. hip and shoulder joint

Question 8

All synovial joints have

Answer 8

Articular surfaces on bones, articular cartilage covering articular surface, fluid filled joint cavity enclosed by joint capsule

Question 9

Hinge joint

Answer 9

Can bend in only one direction, ex. knee and elbow

Question 10

Plane/gliding joint

Answer 10

Opposing surfaces are nearly plane and there is only a slight gliding motion, ex. wrist and vertebrae

Question 11

Pivot joint

Answer 11

Allows limited rotation, ex. head and neck