Fine structure and innervation of smooth muscle in the monkey oviduct.

The smooth muscle of the monkey oviduct is similar to that described for other species and organs. Cell-to-cell contacts, in the form of simple appositions, were numerous. The adrenergic nerve supply was sparse, and close contacts between nerve and muscle were extremely rare. There was no difference in the density of innervation between the isthmus and ampulla. The rabbit appeared to have a greater denisty of innervation than the monkey.