part_of starts_at ends_at cloaca cloacal epithelium EMAPA:27577 The cloacal epithelium (cle) (syn: cloacal endoderm) (TS:17-TS:20) is derived from endoderm and lines the cloacal cavity. It is marked by Shh and Cdh1 and lines the cloacal lumen. The cloacal epithelium gives rise to the urogenital sinus epithelium, hindgut epithelium and the urethral plate epithelium. cloacal endoderm EMAPA:27640 anatomical_structure urinary system epithelium genitourinary system epithelium TS17 TS20