The Muscular System By Aidan hartel

3/31/17 D Block Life Science Honors

The muscular system helps the body to move around. It's what makes the body walk, jump, hold, look, point many other things.

There are three main types of muscle tissue, smooth, cardiac, and skeletal. Smooth muscle cells are in the walls of visceral organs, except the heart. The heart has tissue made up of cardiac cells. The skeletal muscle cells are in muscles that are attached to bones, like our biceps and abs.

These are some of our bodies major muscles. They are the pectoralis, biceps, quadriceps, deltoid, tibialis anterior, and the frontalis.

To help move, the muscles work in pairs. For example, to move the arm up and down, the bicep will flex while the triceps relaxes, and vice versa.

Muscles can not push, only pull. Muscles make up 40% of our body weight. Humans are born with all the muscle fibers they will ever have. Our body has over 600 muscles. It takes 17 muscles to smile, and 43 to frown!

One disease brought upon the muscles is muscles weakness, or muscle atrophy. This disease can bring great disability among people, because it reduces the muscles size strength and mobility. Weaker muscles makes easy everyday tasks difficult, like lifting a pencil.

the muscular system works with another system; the skeletal system. The skeletal system gives shape and durability to the body. The muscles attach to the skeletal system to move the skeletal system. The skeletal system moves the entire body with it because it is the shape and main structure of the body.

The muscular system works with the circulatory system too. The heart is a muscle that pumps blood through the entire body.

http://www.innerbody.com/image/musfov.html

https://medlineplus.gov/ency/imagepages/19841.htm

http://www.softschools.com/facts/human_body/muscles_facts/173/

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