Science, asked by aishasiddiqa123, 1 year ago

differentiate between striated,unstriated and cardiac muscles on the basis of their structure and location in the body

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Answered by AkashMandal
64
Difference between Striated Muscle Fibres , Smooth Muscle Fibres and cardiac Muscle Fibres :

♣ STRAITED MUSCLE FIBRES :
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→ They are long cyclindrical cells.

→ The fibres have blunt ends.

→ They possess striations or alternate light and dark bands.

→ Intercalated discs and cross connections are absent.

→ The muscle fibre is multinucleate . nuclei are oval in outline . They occur peripherally below the sarcolemna.

→ They occur in bundles.

→ Straited muscle fibres occur in limbs, hands, feet , body wall, tounge , pharynx and upper part of oesophagus.

→ They are voluntary .

→ They are able to perform fast and powerful contractions.

→ They soon get fatigued.

♣ SMOOTH MUSCLE FIBRES :
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→ The fibres are elongated and spindle shaped.

→ The fibres have pointed ends.

→ Striations or light and dark bands are absent.

→ Intercalated discs and cross- connections are absent.

→ Smooth Muscle Fibres is uninucleate . nucleus is centrally placed , oval or elongated.

→ They generally form sheets.

→ The fibres occur in dermis, urinogenitical tracts, digestive tract , lungs, Iris, blood vessels, etc.

→ They are involuntary.

→ They perform slow but prolonged contractions.

→ Fatigue is rare.

♣ CARDIAC MUSCLE FIBRES :
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→ The cells are small and cyclindrical.

→ The fibres have broad ends. Striations are present but they are fainter than those of Straited muscle fibres.

→ Intercalated discs and cross- connections are present.

→ The cells are uninucleate . nucleus in oval- rounded . It is centrally placed.

→ They form a network.

→ The muscle fibres occur only in the wall of heart.

→ They are involuntary.

→ cardiac Muscle fibres performs powerful and rhythmic contractions.

→ They seldom get fatigued.
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Answered by vidhiraghu7
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