Question

explain how muscles bring about movement in your arm. answer in class 6

Answer 1

Muscles are attached to bones by tendons at two points, the origin, and insertion. Movement is produced by the contraction of muscles which then move the bones at the attachments and that is how the body is able to move.

Answer 2

The muscles work in pairs. When one of them contracts, the bone is pulled in that direction, the other muscle of the pair relaxes. To move the bone in the opposite direction, the relaxed muscle contracts to pull the bone towards its original position, while the first relaxes. A muscle can only pull. It cannot push.