1.lihaskudos, joka ei ole poikkijuovaista ja joka supistuu ilman tahdonalaista kontrollia sisäelinten seinämissä
1.muscle tissue that does not appear striated under the microscope; has the form of thin layers or sheets
2.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)