Nature of valves in heart is a) muscular b) membranous c) Tendinous d) Ligamentous
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a) muscular
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The walls of the heart are muscular and these muscles are called as the cardiac muscles. These are the striated which means that they have light and dark bands present in them. They are also involuntary meaning humans do not have control on them. The other two types of muscles that are found in the humans are Smooth and skeletal.
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