known as cardiac and it never tires. But the body also has many other paired muscles, some voluntary that are attached to the skeleton and help the body move, some involuntary that work the internal organs and cannot be controlled. Muscles and posture also go hand in hand, where regular exercise tones muscle and improves your posture to reduce strain on other parts of the body.
http://www.bbc.co.uk/schools/gcsebitesize/pe/appliedanatomy/3_anatomy_muscles_rev1.shtml
Is it grammatical "work the internal organ"?
Hi I'd say that's good. It's slightly informal Most people would think of the main internal organ as the heart. You have to keep it going, to stay alive.
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Hi
I'd say that's good. It's slightly informal
Most people would think of the main internal organ as the heart. You have to keep it going, to stay alive. That involves good exercise - you have to work that internal organ!
Dave