The elbow, working like a door hinge, is an example of a:
APivot joint
BPlane joint
CSaddle joint
DHinge joint
Answer & Solution
Correct answer: D. Hinge joint
1. It bends and straightens in one plane only.
2. The comparison is with a door.
3. So it is a hinge joint.
_Source: OpenStax Anatomy and Physiology 2e, Chapter 9, Joints._
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