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Understanding Different Types of Muscle Tissue for Body Function

Learn about skeletal, cardiac, and smooth muscles, their characteristics, functions, locations in the body, and features such as voluntary or involuntary control. Explore how muscles contract and propel substances in various organs. Discover the importance of muscle tissue in overall body movement and health.

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Understanding Different Types of Muscle Tissue for Body Function

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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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