Anus Info And Diagram

Anus Info And Diagram
Anus Your anus is the end of your large intestine, where food waste completes its journey through your digestive tract and makes its exit. Muscles, nerves and mucous membranes in your anus work together to make healthy bowel movements that you can control. They also work to keep your anus closed to infections coming in from the outside.
Anatomy of the human anus. Frontal section. The anus is the final part of the gastrointestinal tract, and directly continues from the rectum, passing through the pelvic floor. The top and bottom of the anus are surrounded by the internal and external anal sphincters, two muscular rings which control defecation. [6]: 397 The anus is surrounded in its length by folds called anal valves, which ...
The anus is formed partly from the surface layers of the body, including the skin, and partly from the intestine. The rectal lining consists of glistening red tissue containing mucus glands—much like the rest of the intestinal lining. The lining of the rectum is relatively insensitive to pain, but the nerves from the anus and nearby external skin are very sensitive to pain. The veins from ...
The anal canal is the most distal portion of the lower digestive tract and is approximately 2-3 inches long. It is enclosed by the internal and external sphincter muscles. The proximal portion of the anus is connected to the rectum, which is the final section of the large intestine. The anal canal terminates at the anal verge, where stool exits the body.
Black and white illustration of cross section of the rectum and anus, with rectum, two exterior sphincters, and two interior sphincters labeled.
Overview The anus is the terminal opening of the digestive tract through which feces are expelled from the body. It marks the end of the anal canal and plays a critical role in the voluntary and involuntary control of defecation. Despite its small size, the anus is a complex structure composed of skin, muscle, vascular tissue, and nerve supply specialized for maintaining continence and ...
Discover the anatomy and function of the anus, its arterial supply, venous and lymphatic drainage, and related clinical correlates.
Anatomy of the Anus The anus is the last part of the digestive tract. It's at the end of the rectum. It's where stool comes out of the body. It consists of a muscular ring (called a sphincter) that opens during a bowel movement to allow stool (feces) to pass through, as well as flat cells that line the inside of the anus.
Aug 5, 2025
Nov 6, 2025
Lybrate's Anus Anatomy Page provides detailed images, definitions, functions, parts, location, and conditions that affect the anus, and more
The anus is one of the most important yet often underappreciated parts of the human body. Located at the end of the digestive tract, it serves a vital function in waste elimination and plays a crucial role in maintaining overall health and well-being.
Nov 25, 2025
The anus is the opening at the end of the digestive tract where stool leaves the body. The rectum is the section of the digestive tract above the anus where stool is held before it passes out of the body through the anus.
Picture of Anus The anus is the one and a half inch long circular ring of tissue that leads from the latter part of the rectum to the outside. Feces pass through the intestines and leave the body via the anus. The anus is connected to the last part of the large intestine, the rectum.
The anal canal is 3-4cm in length, extending from the external anus to the anorectal junction. It is surrounded by powerful sphincter muscles which facilitate defaecation and maintain continence:
Anus: The opening of the rectum to the outside of the body. The word "anus" comes straight from the Latin. It referred to the same structure to the Romans. It also meant a "ring" in the sense of an encirclement which was entirely appropriate since the anus encircles the outlet of the bowel. Image Source: MedicineNet, Inc. Text: MedicineNet, Inc.
Your rectum holds the waste and absorbs the remaining water until it's time to release it. What is the difference between the rectum and the anus? Your anal canal continues from your rectum and makes up the last few centimeters of your large intestine. The anus contains important muscles (anal sphincters) that control your bowel movements.
Imperforate anus: Congenital defect where anal opening is absent or misplaced; associated with failure of anal membrane rupture Anal carcinoma: Tumor behavior and prognosis differ above and below pectinate line due to embryological and lymphatic differences
Nov 25, 2025
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THE ANUS The anus is the outlet of the gastro-intestinal tract. (Fig. 1) It is a slit in its resting period. It is expandable, conforming to the size and shape of the fecal content, and it normally varies from 1.2 to 3.5 cm in diameter in the act of defecation. The anus is surrounded by the subcutaneous muscle of the external sphincter (Fig. 2).
The vulva refers to the external female genitalia, encompassing the structures visible outside the body. It includes the mons pubis, labia majora, labia minora, clitoris, vestibule, and the external openings of the urethra and vagina. Located in the lower pelvic region, the vulva sits between the thighs and is bounded by the mons pubis at the top and the perineum at the bottom. The vulva forms ...
Before expulsion through the anus or cloaca, the rectum stores the feces temporarily. The adult human rectum is about 12 centimetres (4.7 in) long, [2] and begins at the rectosigmoid junction (the end of the sigmoid colon) at the level of the third sacral vertebra or the sacral promontory depending upon what definition is used. [3]
Jun 26, 2025
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Anatomy Anal canal: Tubular structure 3 - 4 cm long Derived from cloaca (distal hindgut) and arises at level of prostatic apex, is directed downward and backward and ends at anus Boundaries are proximal and distal margins of internal sphincter muscle and includes part of rectum
Dec 31, 2025
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Deep perineal fascia (Gallaudet's fascia): Invests the perineal muscles Location The perineum lies below the pelvic diaphragm and between the thighs. It is inferior to the levator ani muscle and is located between the external genitalia and the anus. It is most easily visualized in the lithotomy position or when the thighs are abducted.
May 26, 2025
Picture of Hemorrhoid Hemorrhoids are distended veins inside the rectum and around the anus. Hemorrhoids may be caused by straining during bowel movements, obesity, pregnancy, and other conditions. Hemorrhoid symptoms may include seeing blood in the toilet or on toilet paper, pain, swelling, and itching.
Overview The gastrointestinal tract processes food from ingestion to excretion and occupies much of the abdominal cavity. This section introduces the structure and organisation of its main components, highlighting their roles in digestion and absorption. Key Structures Topics cover the oesophagus, stomach, small intestine, appendix, caecum, colon, rectum and anal canal, with emphasis on ...
Comprehensive anatomy of the female and male perineum including of spatial relationships, anal triangle, anus, rectum, boundries of the ischioanal fossa, pathophysiology of spread of infection due to perianal abscess, urogenital triangle and perineal pouches, including the extravasation of urine in the superficial perineal pouch.
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The anus is the last part of the digestive tract. Learn more about its anatomy, including where anal cancer is likely to start.
The rectum is the concluding part of the large intestine that terminates in the anus. The average length of the human rectum may range between 10 and 15 cm.
Schematic drawing of human anus and related structures. Version without labels. Original by Jmarchn at https://commons.wikimedia.org/wiki/File:Human_anus-en.svg
Nov 6, 2025
Your large intestine turns food waste into poop. It includes your cecum, colon, rectum and anus. It's a tube that runs from your small intestine to your anal canal.
The mucous lining in your anus also secretes mucus, creating a slip and slide for your poop to exit smoothly. What is the anatomy of the anus? Let's roll our sleeves up and get into the science-y stuff, we even have a diagram! The first thing to know is that the internal anus is split into 2 parts.
Your anus is the last two inches of your large intestine. Poop in your rectum triggers your anal sphincter muscles to release so it can come out.
Human male anus In anatomy, the anus (from Latin ānus "ring (circle) [1][2], anus") is the external opening of the rectum. Closure is controlled by sphincter muscles. Feces are expelled from the body through the anus during the act of defecation, which is the primary function of the anus. Most animals—from simple worms to elephants and humans—have a tubular gut, with a mouth at one end ...
Media in category "Anatomy of male anogenital area" The following 19 files are in this category, out of 19 total.
Presentation slides about the human anus: 1) showing the delimitation of anus and rectum, the pectinate line and internal and external anal sphincters 2) showing the internal and external rectal venous plexuses 3) showing the difference in connections of the neurovasculature superior and inferior to the pectinate line You can use these slides for instance in presentations or to create custom ...
Dec 7, 2025
Original diagrams from Gray's anatomy, now out of copyright. These diagrams have been reproduced from Gray's Anatomy 20th US edition which has now lapsed into the public domain
Discover the digestive system and understand its intricate processes. From mouth to the intestines, learn about each organ's role in digestion.
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