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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