Smooth-muscle cushions in arteries.
D000375:Aging; D001158:Arteries / Q000033:anatomy & histology* / Q000502:physiology; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009130:Muscle, Smooth / Q000033:anatomy & histology* / Q000502:physiology; D011247:Pregnancy