Download • Muscle Tissues- highly cellular, well

10/16/2008
• Muscle Tissues- highly cellular, well-vascularized tissues
responsible for movement
• Myofilaments- brings about movement/ contraction in cell
types
• Skeletal- packaged by connective tissue sheets
• Muscle Fibers- long, cylindrical cells; contain many
nuclei
• Cardiac muscle- found in cell wall of heart
Intercalated discs- branching cells that fit together tightly at
junctions
Smooth muscle- cells have no visible striations; spindle
shaped & contain one central located nucleus
Voluntary muscle- contraction; conscious control (skeletal
muscle)
Involuntary muscle- no control over contraction (Cardiac &
Smooth)
Intercalated Discs
Smooth Muscle
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• Skeletal
-Voluntary movement;
locomotion
• Cardiac
-Propels blood into
circulation; involuntary control
• Smooth
-Propels substances
along internal passageways;
involuntary control
• Cardiac muscles are found in heart
• Cells are joined to one another by
intercalated discs; allow the
synchronization of heart beat
• The cardiac muscle is branched and
striated muscle
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Attached to bones by tendons
Involved w/ voluntary muscle
Striated muscle
Cells are not branched unlike cardiac
muscle
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• Found in various parts of body; arteries,
bladder, digestive tract
• Doesn’t have cross striations
• Contracts slower than skeletal
• Contraction sustained over a longer period
of time
http://biology.about.com/od/anatomy/a/aa0
22808a.htm
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