Question

why our knee bends only in one direction s​

Answer 1

Answer:

Hinge joints, such as those found at the elbow, are the most resticted in direction of movement. The simple explanation for why they bend the way they do is that their range of motion reflects their design - this idea is often expressed as "form dictates function".

Answer 2

Answer:

Our knee bends only in one direction because it is a hinge joint.

A hinge joint is a joint that moves only in 1 direction. Example : Elbow, knee etc...

Explanation: