Period+1+Muscular+Notes

We're going to make a video like the show the Magic School Bus where we are going into the body and talk about the muscular system.

http://library.thinkquest.org/2935/Natures_Best/Nat_Best_Low_Level/Muscular_page.L.html#Musclular_System
 * More than 360 muscles.
 * Four groups of muscles- extendors, flexors,abductors,adductors.
 * Muscles don't connect to the bones directly.
 * Three types of muscles - cardiac, smooth, and skeletal.
 * Skeletal muscle or "voluntary muscle": They only work when you specifically tell them to.
 * Smooth muscle or "involuntary muscle": Found within the walls of organs and structures such as esophagus, stomach, intestines, bronchi, uterus, urthera, bladder, blood vessels and even the skin.
 * Cardiac muscle is also an "involuntary muscle" but is more akin in structure to skeletal muscle, and its found only in the heart.
 * Muscles move because the cells that make up your muscles contract and then relax back to their original size.
 * Muscles can't push, they pull. Muscles often work in pairs so they can pull in different or opposite directions.
 * Over 30 facial muscles.
 * Eye muscles are the busiest muscles in the body. Scientists estimate they may move more than 1000,000 times a day.
 * The largest muscle in the body is the gluteus maximus muscle.
 * Probably 40% of your body weight is in the muscles.
 * Muscles help you move!