Write a short note on cardiac muscles.

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Solution

$∙$ Cardiac muscle is one of three main types of muscle, the others being skeletal and smooth muscle. Cardiac muscle (heart muscle) is striated muscle(striped muscle) in the walls of the heart. (1 mark)

$∙$ It makes up the tissue called the myocardium. It is involuntary a person cannot control it consciously. (1 mark)
$∙$ The muscles of the heart (cardiac muscle) show rhythmic contraction and relaxation throughout life. (1 mark)

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(b) Cardiac muscle
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(d) Voluntary muscle

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Question 8
Which of the following types of muscle are involuntary?
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(ii) Smooth muscle
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(b) (ii) and (iii)
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(d) (i) and (iv)

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Muscles

Standard VI Biology

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