Respuesta :

maziarzashlee
When a muscle contracts, usually just one bone moves. The other is stationary. The origin is where the muscle joins the stationary bone. The insertion is where it joins the moving bone. hope this helped!! :)
luqman99204

Answer:

Muscular contractions are the stuff that allow an animal or human, to move its body, move the food in its digestive system, or a bunch of other activities. The contraction shortens the muscle which moves the hard structures, bones, to which they are connected.

Explanation: