Question

we can move our arm in circular motion but not our knee why?​

Answer 1

Answer:

We can move our arms in circular motion but not our elbow because the joints at the elbow are the ball and the socket joint whereas the joints that are present in our elbow is the hinge joint. The ball and the socket joints can be rotated to 360 degree.

Explanation:

mark as brainliest answer

Answer 2

Answer:

This is because in our elbow we have ball and socket joint but in our knee we have hinge joints.

Ball and socket joint can rotate upto 360 degrees but hinge joints can only move upward and backwards!

This may help you..!!

Please mark me as the brainliest..!!