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Part III: Muscle Tissue

Part III: Muscle Tissue. 3 types: Skeletal muscle Cardiac muscle Smooth muscle. Skeletal Muscle. Description : Long, cylindrical Multinucleate (2+ nuclei) Striated (banded appearance) Function : Muscles contract, pull on bones or skin  cause body movements Location in the body :

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Part III: Muscle Tissue

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  1. Part III: Muscle Tissue • 3 types: • Skeletal muscle • Cardiac muscle • Smooth muscle

  2. Skeletal Muscle • Description: • Long, cylindrical • Multinucleate (2+ nuclei) • Striated (banded appearance) • Function: • Muscles contract, pull on bones or skin  cause body movements • Location in the body: • Attached to skeleton • Other features: • Voluntary control

  3. Cardiac Muscle • Description: • Striated • Uninucleate (1 nucleus) • Branching cells – fit at junctions called intercalated discs • Function: • Propel blood through blood vessels to all parts of body • Locations in the body: • Walls of the heart • Other features: • Involuntary control

  4. Smooth Muscle • Description: • No visible striations • 1 central nucleus • Spindle-shaped (pointed ends) • Function: • Propel substances through hollow organs • Locations in the body: • Walls of organs (stomach, bladder, uterus, blood vessels) • Other features: • Involuntary control • Contracts slowly • Peristalsis: wavelike motion that moves food through SI

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