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Ball and socket joint
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- A joint where the rounded end of one bone fits into the cavity (hollow space) of another, allowing movements in all directions.
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Pivotal Joint
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- The pivotal joint facilitates bending the head forward and backwards, as well as turning the head to the right or left.
- Unlike the ball and socket joint where the arm can perform circular rotations, the pivotal joint involves a cylindrical bone rotating within a ring, showcasing the diversity in joint mechanics.
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Hinge Joint
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- The elbow and knee, acting as a hinge joint, showcases a back-and-forth motion.
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Fixed joint
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- Joint in the head that differ from movable joints, are known as fixed joints.
- In these joints, bones do not have the ability to move.
- An example is the joint between the upper jaw and the rest of the head, which is fixed.
- Contrasting the movement of the lower and upper jaws highlights the nature of fixed joints.
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