The Muscular System

• over 600 muscles in the body

• all movement, support, heat production

Types:

• Skeletal Muscles:

  • involuntary, striated (lines under microscope) and attach to bones by tendons and connective tissue

  • 30 - 40% of body weight

    

• Cardiac Muscles:

  • involuntary, striated, found only in heart

  • directed by autonomic nervous system

    

• Smooth Muscles

  • involuntary, non-striated, and surrounded by internal organs

  • ex. blood vessels, hair follicles, urinary and digestive tracts

    

All Three side by side:

The Musculoskeletal System

• system of bones, joints, and muscles that provide form, support, and stability to body, giving humans ability to move —> locomotor system

How Muscles are Named