Question

question 21
the carpometacarpal joint is an example of a:
saddle joint
hinge joint
pivot joint
condyloid joint

Explanation:

In anatomy (a subfield of Natural Science, specifically Biology), the carpometacarpal joint of the thumb is a classic example of a saddle joint. Saddle joints allow movement in two planes, and the carpometacarpal joint has the characteristic shape and movement capabilities of a saddle joint. Hinge joints (e.g., elbow) allow movement in one plane, pivot joints (e.g., between atlas and axis) allow rotational movement around a single axis, and condyloid joints (e.g., wrist) have a different structure and movement pattern, so they are not the correct match for the carpometacarpal joint.

Answer:

A. saddle joint