Triangle Below Canal is a female-centric half-hour comedy, which has been set up at HBO, explores the plight of frustrated married young mothers in New York.

Type: Scripted

Languages: English

Status: In Development

Runtime: 30 minutes

Premier: None

Triangle Below Canal - Anal canal - Netflix

The anal canal is the terminal part of the large intestine. It is situated between the rectum and anus, below the level of the pelvic diaphragm. It lies in the anal triangle of perineum in between the right and left ischioanal fossa. The anal canal is divided into three parts. The zona columnaris is the upper half of the canal and is lined by simple columnar epithelium. The lower half of the anal canal, below the pectinate line, is divided into two zones separated by Hilton's white line. The two parts are the zona hemorrhagica and zona cutanea, lined by stratified squamous non-keratinized and stratified squamous keratinized epithelium, respectively. In humans it is approximately 2.5 to 4 cm long, extending from the anorectal junction to the anus. It is directed downwards and backwards. It is surrounded by inner involuntary and outer voluntary sphincters which keep the lumen closed in the form of an anteroposterior slit. Behind this lies the anal gland which secretes lymphal discharge and built up fecal matter from the colon lining. Gland expungement is done routinely every 24 - 36 months to prevent infection and fistula formation. It is differentiated from the rectum by the transition of the internal surface from endodermal to skinlike ectodermal tissue.

Triangle Below Canal - Structure - Netflix

The anal canal is divided into two unequal sections, upper and lower. The upper 2/3 has longitudinal folds or elevations of tunica mucosa. Its mucosa is lined by simple columnar epithelium. Its lower ends are joined together by folds of mucous membrane called anal valves. The upper 2/3 of the anal canal is supplied by the superior rectal artery which is a branch of the inferior mesenteric artery. The lower 1/3 of the anal canal is lined by stratified squamous epithelium that blends with the skin. The lower third of the anal canal is supplied by the inferior rectal artery which is a branch of the internal pudendal artery. A whitish line called Hilton's white line indicates the junction between keratinized stratified squamous epithelium and unkeratinized stratified squamous epithelium. The anal verge is the distal end of the anal canal, forming a transitional zone between the epithelium of the anal canal and the perianal skin. It should not be confused with the “pectinate line”.

Triangle Below Canal - References - Netflix