The lamina propria is rich in blood vessels and lymphatic channels. The muscular layer is made up of smooth muscle mass fibers, by having an outer layer of longitudinal muscle, an internal layer of round muscle, and oblique muscle mass fibers among. The outer layer, the adventitia, is a thin https://raymondsdozi.idblogmaker.com/30556017/the-smart-trick-of-ass-that-no-one-is-discussing