Answer:
(a) Pivot joint is the
joints found between the atlas and axis and between the radius and ulna just
below the elbow This joint allows the movement in only one plane. In a pivot
joint, rounded or pointed bone tits into a shallow depression of another bone.
Whereas,
saddle joint provides free movement in two planes back-forth and side to side.
The projection of one bone fits in saddle-shaped depression of another bone.
The joint between the carpel and metacarpel of thumb in the hand is an example
of saddle joint
Saddle
joint
Hinge joint
allows movement primarily in one plane. In a hinge joint reel (spoon) like surface
of one bone fits into the concave surface of another-'bone. for example the elbow,
the knee, ankle etc.
Gliding
joint also known as plane joint, it is a common type, of synovial joint formed between
bones that meet at flat or nearly flat articulating surface examples of gliding
joint include carpel bones of the wrist and joint between the carpel and
metacarpal of the palm.
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