Muscular System

• The Muscular System - consists of skeletal muscles, smooth muscles, and cardiac muscles, which are attached to the skeleton and are responsible for movement.
• Skeletal Muscles are voluntary and attached to the bones by tendons. These muscles give shape to the body
• Smooth Muscles - not attached to the bones. They are involuntary muscles, they work automatically. They help blood flow and are located in the stomach
• Cardiac muscles are found in the heart and are responsible for pumping blood throughout the body.
• The heart beats at the rate of 70 times per minute or more than 100k times a day
• There are about 640 muscles in the body
• Muscle fibers - are bundles of muscle cells that contract to produce movement.
• The muscle contracts to pull a bone
• The muscle gives shape and mass to the body
• The muscular system supports the skeletal system and keep it steady
• A muscle is made out of bundles called muscle fibers
• What muscle is attached to the bone and is responsible for movement?

  Skeletal Muscle
• When the muscle contracts, it pulls the tendon which pulls the bone
• Smooth Muscles are found in the walls of blood vessels, esophagus, and stomach
• Peristalsis - part of the smooth muscle, is a rhythmic movement that pushes the chewed food
• Stapedius Muscle - smallest muscle, located in the ear