1.  smooth muscle(n = noun.body) involuntary muscle - a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart);
is a kind of muscle, musculus
has particulars: myometrium, musculus sphincter ani internus

2.  smooth muscle(n = noun.body) - muscle tissue that does not appear striated under the microscope; has the form of thin layers or sheets;
is a kind of muscle, muscular tissue
has parts: smooth muscle cell

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