how do the muscles in the human body help with movement?  a.  they squeeze the bones.  b.muscles contract and
What Muscles Do. 1. Contract (squeeze) and thereby cause the movement of different parts of the body. For example, they move joints and bones so we can do things like raise our arm and walk. Muscles move food along our digestive system, open and close our eyes, circulate blood through our body. Different types of muscles carry out different actions. 2. Keep joints (like the hip joint) stable and in place.