4.+EXTRA+INFORMATION

The muscular system makes up nearly half the weight of the human body, this is why when we train we sometimes put on weight instead of losing it. We put on muscle weight.

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 * Rapid muscular contraction is important generating internal heats another homeoestic funtion.
 * The biggest muscle is the gluteus maximus and the smallest bone is the stirrup.
 *  They do everything from pumping blood throughout your body to helping you lift your heavy backpack. You control some of your muscles, while others — like your heart — do their jobs without you thinking about them at all.


 * Also you have more than 640 hundreds muscles.
 * The muscles provide the forces that enable the body to move. Muscles stretch across joints to link one bone with another and work in groups to respond to nerve impulses.All the muscles of the body from run to expel urine from the bladder depends on the muscles.The muscles are made of cells that have the unique ability to contract to become more small. These functions are possible by the nerve impulses that send the welcome. There are 3 types of muscles: 1 the skeleton as its name suggests moving the skeleton. They are attached to bones through joints by means of ropes called tendons. 2 the smooth muscle that is located in the walls of the concave or hollow organs such as bladder and bowel vessels sanguineos. 3 the heart muscle that is on the wall of the heart. This automatically shrinks life pumping blood around the body.
 * Heart muscles are distinct from skeletal muscles because the **muscle fibre** are laterally connected to each other. Furthermore, just as with smooth muscles, they are not controlling themselves. Heart muscles are controlled by the sinus nodre influenced.