LAB 8 - Joints

Question 1

What are the three categories of the joints and their functions?

Answer 1

• synarthrosis (no movement)
• amphiarthrosis (slight movement)
• diarthrosis (fully moveable)

Question 2

Sutures

Answer 2

• synarthrosis
• sheets of dense fibrous c.t. connecting 2 cranial bones
  eg. between bones of skull

Question 3

Gomphoses

Answer 3

• synarthrosis
• periodontal ligament formed from dense fibrous c.t. holds tooth in bony socket
  eg. only teeth

Question 4

Synchondroses

Answer 4

• synarthrosis
• rigid bridge of hyaline cartilage, holds two bones together
  eg. epiphyseal plate, rib #1, sternum

Question 5

Synostosis

Answer 5

• synarthrosis
• bone tissue fuses two bones
  eg. mature skull

Question 6

Syndesmosis

Answer 6

• amphiarthrosis
• -sheets of fibrous c.t. or band of fibrous c.t. holds 2 bones together
  eg. short: tibia, fibula
  long: radius/ulna

Question 7

Symphysis

Answer 7

• amphiarthrosis
• a wedge of fibrous cartilage holds 2 bones together
  eg. intervertebral discs, pubic symphysis

Question 8

Synovial

Answer 8

• diarthrosis
• a fluid filled capsule enclosing the joint between 2 bones
  eg. joints of limbs (6)

Question 9

What are the 6 synovial joints?

Answer 9

• gliding
• ball and socket
• ellipsoidal
• hinge
• saddle
• pivot

Question 10

Gliding joint

Answer 10

eg. carpals

Question 11

Saddle joint

Answer 11

eg. trapezium

Question 12

Pivot joint

Answer 12

eg. atlas/axis

Question 13

Condyloid/ellipsoidal joint

Answer 13

-phalanx

Question 14

Hinge joint

Answer 14

-elbow, knee

Question 15

Ball and socket joint

Answer 15

-arm, shoulder