Detail of the muscular layer observed with the objective of 100x. It is composed by the external layer, formed by longitudinally-arranged smooth muscle fibers and the internal layer (yellow), formed by circularly-arranged fibers. We can note the nuclei of the fibers in both layers. We also appreciate part of the conjunctive submucous, containing a nervous ganglion corresponding to the Meissner plexus, in which we can distinguish some neurons by means of their prominent nucleus