The lamina propria is full of blood vessels and lymphatic channels. The muscular layer is made up of smooth muscle fibers, using an outer layer of longitudinal muscle mass, an interior layer of round muscle mass, and oblique muscle mass fibers in between. The outer layer, the adventitia, is a https://terror-us79145.blog2learn.com/79273295/the-smart-trick-of-ass-that-no-one-is-discussing