The Muscular System By Daniel Manalo and Angel Cabral

Muscle Structure

o Muscles contain connective tissues which holds muscle cells together and provides elasticity o Muscle tissue also contains large amounts of contractile filaments. o These protein filaments are called actin and myosin o Actin and myosin enables muscles to contract o Other characteristics of muscle tissue include the ability to stretch or expand and also the ability to respond to stimuli

Muscle Structure

Function Skeletal Muscles o The primary function of skeletal muscles are to produce voluntary gross and fine movement o Skeletal muscles also protect organs o The abdominal muscles and the muscles of your lower back helps to protect your vital organs

Skeletal Muscles Function

Cardiac muscle o Cardiac muscles pumps blood o The contraction of the heart is involuntary and primarily controlled by your heart’s electrical system

Smooth muscle o Smooth muscles are the muscles you have in your stomach and intestine o They work to process the food you eat o Smooth muscles in the walls of your blood vessels ensure blood flow

Distal Muscular Dystrophy o Symptoms: weakness and wasting of muscle of the hands, forearms, and lower legs o Distal muscular Dystrophy is caused by defects genes o typical onset age is 20 to 60 years old. o No known cure Disease

Sources Wikipedia. Wikimedia Foundation. Web. 29 Apr "Five Functions of the Muscular System." LIVESTRONG.COM. Web. 29 Apr Johnson, George B., and Peter H. Raven. Holt Biology. Orlando: Holt, Rinehart and Winston, Print.