| A | B |
|---|
| muscle | organ that contracts and gets shorter |
| involuntary muscle | any muscle that you do not consciously control |
| voluntary muscle | any muscle that you can control |
| skeletal muscle | voluntary muscle that is the most numerous in the body |
| smooth muscle | involuntary muscles in the digestive system |
| cardiac muscle | involuntary muscle found only in th heart |
| muscular system | makes movement possible |
| common name for gastrocnemius | calf muscle |
| scientific name for stomach muscle | rectus abdominus |
| muscle found on the shoulder | deltoid |
