synovial joints

Question 1

the rounded end of one bone fits into a sleeve or ring of bone (and possibly ligaments); uniaxial joint for it can only turn around its long axis

Answer 1

pivot joint

Question 2

egg-shaped articular surface of one bone fits into an oval concavity in another; allow the moving bone to travel (1) from side to side and (2) back and forth, but the bone cannot rotate around its long axis

Answer 2

condylar joint

Question 3

each articular surface has both convex and concave areas; allow essentially the same movements as condylar joints

Answer 3

saddle joint

Question 4

spherical head of one bone fits into the round socket in another; allow movement in all axes, including rotation, and are the most freely moving synovial joints

Answer 4

ball and socket joint