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| Coronal section of rectum and anal canal. The rectum (from the Latin rectum intestinum, meaning straight intestine) is the final straight portion of the Large intestine in some Mammals | |
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| Coronal section through the anal canal. B. Cavity of urinary bladder V. In Anatomy, the urinary bladder is a hollow muscular, and distensible (or elastic organ that sits on the Pelvic floor in Mammals It is the D. Ductus deferens. The vas deferens (plural vasa deferentia also called ductus deferens, ( Latin: "carrying-away vessel" is part of the Male Anatomy S. V. Seminal vesicle. The seminal vesicles ( glandulae vesiculosae) are a pair of simple tubular glands posteroinferior to the Urinary bladder of males R. Second part of rectum. The rectum (from the Latin rectum intestinum, meaning straight intestine) is the final straight portion of the Large intestine in some Mammals A. C. Anal canal. L. A. Levator ani. The Levator ani is a broad thin Muscle, situated on the side of the Pelvis. I. S. Sphincter ani internus. The Sphincter ani internus (or internal anal sphincter) is a muscular ring which surrounds about 2 E. S. Sphinear ani externus. The Sphincter ani externus ( external anal sphincter) is a flat plane of muscular fibers elliptical in shape and intimately adherent to the integument surrounding the margin | |
| Latin | canalis analis |
| Gray's | subject #249 1184 |
| Artery | inferior rectal artery |
| Vein | inferior rectal vein |
| Lymph | superficial inguinal lymph node (below pectinate line) internal iliac lymph nodes (above line) |
| Precursor | hindgut, proctodeum |
| MeSH | Anal+Canal |
| Dorlands/Elsevier | c_04/12208538 |
The anal canal is the terminal part of the large intestine. Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. Gray's Anatomy the Respiratory apparatus ( Apparatus Respiratorius Respiratory system Respiratory apparatus Arteries are Blood vessels that carry blood away from the Heart. The inferior rectal artery ( inferior hemorrhoidal artery) is an Artery that supplies blood to the lower half of the Anal canal. In the Circulatory system, a vein is a Blood vessel that carries Blood back toward the Heart (as opposed to Artery, a blood vessel The lower part of the external Hemorrhoidal plexus is drained by the inferior rectal veins (or inferior hemorrhoidal veins) into the Internal pudendal vein The lymphatic system in Vertebrates is a network of conduits that carry a clear fluid called Lymph. The superficial inguinal lymph nodes form a chain immediately below the Inguinal ligament. The pectinate line ( anocutaneous line, dentate line, anal verge, anorectal junction) is a line which divides the anal canal into upper and lower The internal iliac lymph nodes (or hypogastric) surround the Internal iliac artery and its branches (the hypogastric vessels) and receive the Lymphatics Embryology (from Greek grc ἔμβρυον embryon, "unborn embryo" and grc -λογία -logia) is the study of the development The Hindgut (or epigaster) is the Posterior ( Caudal) part of the Alimentary canal. A proctodeum is the back ectodermal part of an Alimentary canal. Medical Subject Headings ( MeSH) is a huge Controlled vocabulary (or metadata system for the purpose of indexing journal articles and books Elsevier, the world's largest Publisher of Medical and Scientific literature, forms part of the Reed Elsevier group The large intestine is the last part of the Digestive system: the final stage of the Alimentary canal in Vertebrate Animals Its function is to
It is situated between the rectum and anus, below the level of the pelvic diaphragm. The rectum (from the Latin rectum intestinum, meaning straight intestine) is the final straight portion of the Large intestine in some Mammals The anus is an opening at the opposite end of an Animal 's Digestive tract from the Mouth. The pelvic floor or pelvic/urogential diaphragm is composed of muscle fibers of the Levator ani, the Coccygeus, and associated Connective tissue It lies in the anal triangle of perineum in between the right and left ischiorectal fossae. The anal triangle is the posterior part of the Perineum. It contains the Anal canal. In Human anatomy, the perineum is generally defined as the surface region in both males and females between the Pubic symphysis and the Coccyx. The ischiorectal fossa (or ischioanal fossa) is somewhat prismatic in shape with its base directed to the surface of the Perineum, and its apex at the line of meeting
In humans it is approximately 2. 5 to 4 cm long, extending from the anorectal junction to the anus. The anus is an opening at the opposite end of an Animal 's Digestive tract from the Mouth. 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.
It is differentiated from the rectum by the transition of the internal surface from endodermal to skinlike ectodermal tissue. Endoderm, (sometimes called Entoderm) is one of the Germ layers formed during animal Embryogenesis. The ectoderm is the start of a tissue that covers the body surfaces
The anal canal is divided into two halves, upper and lower. The upper half 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 mucus membrane called anal valves. The upper half of the anal canal is supplied by the superior rectal artery which is a branch of the superior mesenteric artery.
The lower half of the anal canal is lined by stratified squamous epithelium that blends with the skin.
A whitish line called Hilton's white line indicates the junction between simple columnar epithelium and stratified squamous epithelium.
Additional images
 Anatomy of the anus and rectum |
 Left Levator ani from within. |
 The interior of the anal cami and lower part of the rectum. |
 Median sagittal section of male pelvis. |
 Median sagittal section of female pelvis. |
See also
External links
- Norman/Georgetown pelvis
- SUNY Figs 44:05-00 - "The rectum and anal canal in the male pelvis. The lumen of the anal canal presents in its upper half a number of vertical folds produced by an infolding of the mucous membrane and some of the muscular tissue The Rectal columns are separated from one another by furrows or rectal sinuses, which end below in small valve-like folds termed Anal valves. The Rectal sinuses, end in small valve-like folds termed anal valves, which join together the lower ends of the Rectal columns. The pectinate line ( anocutaneous line, dentate line, anal verge, anorectal junction) is a line which divides the anal canal into upper and lower Georgetown University is a Jesuit Private university located in Georgetown Washington D The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind "
- Anal+canal at eMedicine Dictionary
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