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Muscle Types

Muscular System

QuestionAnswer
Endomysium Thin connective tissue surrounding each muscle cell
Perimysium Connective tissue enveloping bundles of muscle fibers into fascicles
Epimysium Sheath of fibrous connective tissue wraps fascicles, surrounds entire muscle
Tendons Strong, cordlike fibrous tissue attaching to a bone
Aponeuroses Sheet-like connective tissue that connects muscles indirectly to muscle or bone
Intercalated Discs Junction between cardiac muscle for coordinated contraction
Similarities among all muscle types All contain actin and myosin (proteins used for contractions) All generate heat and movement All can respond to stimuli
Fascicle A bundle of muscle fibers
Striated Having visible bands or stripes (like skeletal or cardiac)
Voluntary Under conscious control
Involuntary Not under conscious control
Myo- Prefix meaning "muscle"
Skeletal Muscle A type of muscle tissue characterized by long, cylindrical, multinucleated cells with visible striations. It is under voluntary control and is primarily attached to bones.
Cardiac Muscle Found exclusively in the heart wall, it's striated and involuntary. Its cells are branched, typically uninucleate, and connected by intercalated discs.
Smooth Muscle Describes the striped appearance of muscle tissue (skeletal and cardiac) caused by the highly organized, repeating arrangement of contractile proteins (sarcomeres).
Comparison of Muscle Nuclei Skeletal muscle cells are multinucleated (many nuclei per cell). Cardiac and smooth muscle cells are typically uninucleated (one nucleus per cell).
Comparison of Muscle Contraction Skeletal muscle contracts rapidly and powerfully but fatigues. Smooth muscle contracts slowly and rhythmically, and is fatigue-resistant. Cardiac muscle has a steady, rhythmic contraction.
Connective tissue layers of a muscle from innermost to outermost The endomysium (around a single fiber), the perimysium (around a fascicle), and the epimysium (around the entire muscle).
Created by: user-1982482
 

 



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