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How Do Muscles Work?
Some muscles, like the muscles in your heart and digestive system, are involuntary. They work by themselves without you consciously telling them to do anything. Other muscles are voluntary, meaning you order them to move. Both types of muscles are... More »
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Source: www.ehow.com

health.howstuffworks.com/human-body/systems/musculoskeletal/muscle.htm

Muscles are the "engine" that your body uses to propel itself. Although they work differently than a car engine or an electric motor, muscles do the same thing ...

kidshealth.org/en/kids/muscles.html

You control some of your muscles, while others — like your heart — do their jobs without you thinking ... But smooth muscles are at work all over your body.

www.medicinenet.com/how_muscles_work_and_respond_to_resistance_exercise/views.htm

Dec 12, 2016 ... There are 3 types of muscle in the human body. Skeletal, smooth, and cardiac. In order for muscles to move your entire body has to work to ...

www.runsweet.com/starting-sports/how-do-muscles-work

Muscles are the contractile tissue of the body, and produce all movement, and circulation in the body. One muscle fibre is a cell and is composed of a number of  ...

www.ask.com/youtube?q=How+Do+Muscles+Work%3F&v=jxk5tFiGVSE
Jan 8, 2009 ... How Muscles Work. ... Your browser does not currently recognize any of the video formats available. Click here to visit our frequently asked ...

www.sciencedaily.com/releases/2014/11/141126151435.htm

Nov 26, 2014 ... Scientists have elucidated the molecular structure and regulation of the essential muscle protein alpha-actinin. The new findings allow ...

study.com/academy/lesson/what-is-the-muscular-system-function-how-muscles-work-in-groups.html

Ever feel overwhelmed when you look at all those muscles in your textbooks? Well, if you do, then maybe learning a little about their anatomy and...

kidsactivitiesblog.com/17436/how-do-muscles-work

Aug 13, 2012 ... Nicholas has been learning about the muscles in his body. He's learned about the tree types of muscles - smooth, skeletal, and cardiac.

www.livescience.com/39024-human-body-system-musculature-infographic.html

Aug 20, 2013 ... The heart is the hardest-working muscle. It pumps out 2 ounces (57 grams) of blood with every heartbeat. Daily, the heart pumps at least 2,500 ...