The Muscular System

808 Words 4 Pages
What is the most important system in our body? We have 17 systems in our body. The muscular system controls walking, talking, sitting, standing, eating and other daily functions that people constantly perform. It also helps maintain posture and circulate blood and substances through the body, among other functions. The muscular system is associated with the activities of the legs, arms and other things, muscles also control facial expressions, movements and respiration.
There are three types of muscles, skeletal smooth and cardiac, skeletal muscles are the only voluntary muscle tissues in the human body. The smooth muscles are found inside organs such as the stomach and the intestines, and in blood vessels. It is called a smooth muscle because
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The main reason for the muscular system is movement. The system also has other reasons for being needed. The second purpose is hold the body still and in a certain position, the muscles responsible for holding the body up are the strongest of the muscles and have the most endurance. The other function related to movement is the movement of substances inside the body. The muscles responsible for this are the cardiac and visceral, they normally are moving blood or food from one part of the body to another.The final function of the muscular system is to generate body heat. As the result of a high metabolic rate in our body a lot of excess waste heat. Most of the small muscle contractions in our body are what keep our body temperature. When we exert ourselves more than normal we create a lot of internal body heat which later leads to …show more content…
The cardiac muscle is also an involuntary muscle it is not controlled by the conscious mind. While hormones and signals sent from the brain adjust the rate at which the heart contracts, the muscle stimulates itself to contract. The muscle has a natural pacemaker made of muscle tissues that tell the other muscles when to contract. Because the muscle stimulates its self, it is believed to be autorhythmic or intrinsically controlled. The cardiac muscle has striated cells this means they appear to have light and dark stripes when looked at under a microscope. The protein fibers inside the cells cause the dark and light strands. The muscle cell is very strong unlike the visceral muscle. The cells of the cardiac muscle are branched, the x or y shaped cells connect to make intercalated disks. The intercalated disk help the muscle to withstand high blood pressure and the strain of pumping blood throughout a

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