Histology Embryology surface 1, Epithelium two types stratified squamous simple columnar epith 2、 Lamina propria LCT. contained small glands, blood lymph capillaries. mucosa-associated lymphoid tissue 3. Muscularis mucosa inner circular/outer longitudinal layer depth of smooth muscle cellsMucosa 1. Epithelium -------two types stratified squamous & simple columnar epith. 2. Lamina propria LCT. contained small glands，blood & lymph capillaries. mucosa-associated lymphoid tissue 3. Muscularis mucosa inner circular / outer longitudinal layer of smooth muscle cells. depth surface