Question

how do muscles work​

Answer 1

Muscles are attached to bones by tendons and help them to move.

When a muscle contracts (bunches up), it gets shorter and so pulls on the bone it is attached to. When a muscle relaxes, it goes back to its normal size.

Muscles can only pull and cannot push. Therefore muscles have to work in pairs to move a joint. One muscle will contract and pull a joint one way and another muscle will contract and pull it the other.

Answer 2

Answer:

Muscles are attached to bones by tendons and help them to move . When a muscel contracts (bunches up) , it shorter and so pulls on the bone it is attached to. Therefore muscels have to work in pairs to move a joint.