Anorectal Musculature Anatomy
Anterior view, Sigmoid colon, Free taenia, Fibers of taenia spread out to
form longitudinal muscle layer of rectum, Fibers from longitudinal muscle join
circular muscle layer, Window cut in longitudinal muscle layer to expose
underlying, Circular muscle layer, Levator ani muscle, Rectosigmoid junction, Deep,
Superficial, Subcutaneous,
Parts* of external anal sphincter muscle, Fibrous
septum, Perianal skin, Corrugator cutis ani muscle, Superior fascia of pelvic
diaphragm, Inferior fascia of pelvic diaphragm, Levator ani muscle, Rectal
fascia, Longitudinal muscle of rectum, Circular muscle of rectum, Muscularis
mucosae of rectum, Deep part* of external anal sphincter muscle, Internal
rectal venous plexus, Conjoined longitudinal muscle, Superficial part* of
external anal sphincter muscle, Internal anal sphincter muscle, Muscularis
mucosae of anal canal, Transverse fibrous septum of ischioanal fossa, Subcutaneous
part* of external anal sphincter muscle, Corrugator cutis ani muscle, External
rectal venous plexus, Intersphincteric groove (anocutaneous line) Coronal
section.
