Muscles.

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Presentation transcript:

Muscles

Functions of the muscular system

Functions of the muscular system Stabilize joints with their TENDONS Produce movement (including standing upright) Produce heat to maintain body temperature

MUSCLE FACTS There are more than 600 muscles in your body Muscles are made of fibers that run parallel to each other held together in bundles by connective tissue Each fiber is a cylinder shaped cell

Types of muscle tissue

SKELETAL MUSCLE Attaches to bone for movement Striated: banded Voluntary: you control them Can fatigue (tire out)

http://www.bmb.psu.edu/courses/bisci004a/tissues/skeletal.jpg

CARDIAC MUSCLE Found only in the heart Make your heart beat Striated Involuntary: you can’t control it Does not fatigue (tire out)

http://www.sc.edu/union/Sears/AnimalTissue/im.tissueCardiac.jpg

SMOOTH MUSCLE Unstriated Involuntary React slowly and tires slowly Controls breathing, digestive movements, and blood pressure

http://www.bmb.psu.edu

MUSCLE ACTION Muscles always work in pairs While one contracts, the other is relaxed Muscle fibers all have the same strength, so why are some people stronger than others? They have more muscle fibers

http://www.cytochemistry.net/microanatomy/muscle/smooth1.jpg

http://www.sirinet.net/~jgjohnso/muscle.html

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