Physics, there are three types of main muscles, skeletal muscle, cardiac muscle, and smooth muscle, but it's physics that makes all these muscles contract, thus movement. So it's Physics that plays a big role in muscle movements.
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I don't have a scientific answer for that but in my opinion we have already damaged the earth being repair
Attached to bones and allows movement. ...
Smooth muscle – located in various internal structures including the digestive tract, uterus and blood vessels such as arteries. ...
Cardiac muscle – the muscle specific to the heart.
C<span>onsists of cells with much intercellular material between them</span>