Differentiate between, striated, unstriated and cardiac muscles the basis of their structure and site/location in the body.

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Chapter 6 NCERT Class 9 Science SOLUTIONS

8. Differentiate between, striated, unstriated and cardiac muscles the basis of their structure and site/location in the body.

Question:

Differentiate between, striated, unstriated and cardiac muscles the basis of their structure and site/location in the body.

Answer:

S.No.	Striated (Voluntary muscles)	Unstriated (Involuntary muscles)	Cardiac muscles
(i)	Shape–It is long, narrow, cylindrical and unbranched.	Shape–It is long and tapered	Shape–It is cylindrical, having branched containing strips.
(ii)	Muscle fibre is 2.4μm long and 10-30μm wide	Muscle fibre is 100-200μm long and 10μm wide	Muscle fibre is 50-100μm long and 20μm wide.
(iii)	They are found in the hands and feet	They are found in walls of digestive tract, bladder and vessels.	They are found in the heart.
(iv)	They are in the form of bundles	They appear as clusters of tubules.	They are in the form of a network.
(v)	Sarcolemma is found in them	Sarcolema is not found in them	Plasma membrane is found with sarcolema in them.
(vi)	They are voluntary	They are involuntary	They are involuntary
(vii)	Many nuclei are found in them which are towards preiphery	One nucleus is found in each cell in them which are in the middle	One or more nuclei are found in the central part in them
(viii)	They get tired quickly	They do not get tired	They are always active and never get tired
(ix)	Bandages are present in them	Bands are absent in the cells	Only transverse bands are found.
(x)	They are unbranched	They are unbranched	They are connected with each other.

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