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)
muscle tissue that does not appear striated under the microscope; has the form of thin layers or sheets
smooth muscles的用法和样例:
例句
Bundles of smooth muscle are interlacing in the tumor mass. 在瘤组织内平滑肌束是间隔分布的。