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Cardiac muscles are
Option: 1
Cylindrical, voluntary, uninucleate
Option: 2
Cylindrical, striated, involuntary
Option: 3
Involuntary, uninucleate, cylindrical
Option: 4
Involuntary, multinucleate, cylindrical
Answers (1)
Cardiac Muscles -
Location-
- These muscles are present in the walls of the heart and in the large veins like pulmonary veins and superior vena cava.
Structure-
- These show characters of both striped and unstriped muscles.
- Each muscle fibre is a long and cylindrical structure having a definite sarcolemma.
- Fibres contain a single nucleus in the centre.
- Fibres possess certain lateral branches that form a contractile network.
- These lateral branches are called oblique bridges.
- Cardiac muscles have intercalated discs.
- Intercalated discs function as boosters of contractions wave and permit the wave of muscle contraction to be transmitted from one cardiac fibre to another.
Cardiac muscles show characters of both striped and unstriped muscles. Each muscle fibre is a long and cylindrical structure having a definite sarcolemma. The fibres contain a single nucleus in the centre.
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