Differentiate between skeletal, smooth and cardiac …

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Differentiate between skeletal, smooth and cardiac muscles

Posted by Numa Salman 4 years, 8 months ago

Yogita Ingle 4 years, 8 months ago

<th> <div>Smooth Muscles:</div> </th>

• Get their name from their smooth appearance under a microscope.
• Arranged in bundles of muscle fibre sheets.
• Contract involuntarily. Regulated by autonomic part of nervous system.
• Found in walls of hollow structures, including veins, arteries, and intestines.
• Maintain flow of fluid and food along hollow structures.
• Found in hair erectors, pupils, gland ducts, esophagus, bronchi, intestines, stomach, and blood vessels.
• Contract slowly and rhythmically.
<div>• Fatigue slowly.</div>

<th>Cardiac Muscles:</th>

• Found only in heart and at cardiac ends of main blood vessels.
• Contract involuntarily.
• Striated when viewed under a microscope.
• Do not fatigue.
• Contract rhythmically.
• Controlled by central nervous system, but can contract without signals due to "pacemaker" cells.
• Contain high count of mitochondria and myoglobin.
• Have good blood supply.

<th>Skeletal Muscles:</th>

• Are directly attached to the skeleton by tendons.
• Aid in movement and locomotion.
• Are voluntarily activated.
• Appear striped under a microscope. Also called "striated" muscle.
• Fatigue more quickly than smooth or cardiac muscles.
• Are able to stretch and resume original shape.
• Striated appearance comes from formation of actin and myosin muscle fibres.
• Are capable of powerful contractions and, just as adequately, small contractions for delicate movement requiring precision.
• Stimulated by the nervous system's motor neurons.
• Well-supplied with nerves and blood vessels.