Example image of eyePlorer eyePlorer map for 'Anal canal': Large intestine Anus Pelvic floor Rectum Anal triangle Ischioanal fossa Perineum Lumen (anatomy) Ectoderm Endoderm Simple columnar epithelium Inferior mesenteric artery Superior rectal artery Stratified squamous epithelium Inferior rectal artery Internal pudendal artery Hilton's white line Anal columns Anal fissure Anal fistula Houston valve Inferior anal nerves List of subjects in Gray's Anatomy: Alphabetical: A List of subjects in Gray's Anatomy: XI. Splanchnology Rectal ampulla Sphincter ani internus muscle Hindgut ICD-10 Chapter II: Neoplasms List of distinct cell types in the adult human body Endopelvic part of the pelvic fascia List of subjects in Gray's Anatomy: VIII. The Lymphatic system Hemorrhoid Sphincter ani externus muscle Goodsall's rule Hepatic portal system Muscularis externa Human anus Pubococcygeus muscle