caroline+and+tony+notes+period+3

-three different mucle tissue types: cardiac, smooth, skeletal -voluntary muscles-you have conscious control over them -involuntary muscles-muscles not under your concious control -mucles do work by contracting, becoming shorter and thicker. contract when they get messages from nervous system -cuz muscles can contract, not extend, skeletal muscles work in pairs. When one muscle contracts, the other relaxes to its normal state of being -more than 650 muscles in body

-SKELETAL MUSCLES- -attached to bones of skelton -provide force to move bones -tendon at end of each muscle as a strong connective tissue that attaches muscle to bone -look banded/striated -voluntary muscles -example: bicep, tricep, deltoid -40 percent of body weight

-SMOOTH MUSCLES- -inide many internal organs -involuntary -not striated -react more slowly and tire more slowly than skeletal muscles -example: stomach, blood vessels, arteries

-CARDIAC MUSCLES- -found ONLY on wall of heart, mydocardium -involuntary -striated -doesn't tire -it can contract repeatedly (heart beats) -attached together not to bones


 * ==THROUGHOUT LIFE Skeletal muscles[[image:muscle_tissue.jpg]] Cardiac muscles[[image:cardiacmusclesmall.jpg]][[image:T790539A.jpg width="567" height="383"]]Smooth muscles==