Smooth muscle in the human placenta.
D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008854:Microscopy, Electron; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000166:cytology*; D009132:Muscles / Q000502:physiology; D010920:Placenta / Q000033:anatomy & histology*; D011247:Pregnancy