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Rectum : What is the role of the rectum in the human body


 What Is Rectum?

Rectum is a Latin word meaning the “lower end” of the anal canal. It is the first part of the digestive system. The rectum starts at the top of the fundament, or lower abdomen, and descends to the anus.

Rectum is a large muscular organ located at the end of your digestive system. It’s responsible for moving food from your stomach and small intestine through your anus and into your rectum.

Rectum, terminal section of the digestive system in which feces accumulate just prior to discharge. The rectum is continuous with the sigmoid colon and extends 13 to 15 cm (5 to 6 inches) to the anus. A muscular sheet known as the pelvic diaphragm runs perpendicular to the juncture of the rectum and anal canal and maintains a constriction among those two segments of the large gut. The internal hollow space of the rectum is split into three or 4 chambers; every chamber is in part segmented from the others with the aid of permanent transverse folds (valves of Houston) that help to assist the rectal contents. A sheath of longitudinal muscle surrounds the outside wall of the rectum, making it viable for the rectum to shorten in duration.

What Is Rectum

Food wastes continue to be in the sigmoid colon till they're equipped to be excreted from the body. As the fecal fabric enters the rectum, the partitions distend to deal with the fabric. When enough stress builds up in the distended rectal cavity, the urge to eliminate wastes happens. When receptors of the fearful device inside the rectal wall are inspired by way of its stretching, they send impulses to the anal canal, chest and abdominal-wall muscular tissues, and the medulla oblongata of the mind, which makes the person conscious of the want to defecate. See additional defecation.

Digestive system

  1. Digestive system

The structure of the rectum in the human body

  • The rectum is a muscular tube that forms the last section of the large intestine, which connects the colon to the anus. The rectum is about 12 centimeters long and is separated from the sigmoid colon by the rectosigmoid junction, which is where the rectum bends. The rectum is held in place by ligaments and muscles that attach it to the pelvic floor. The rectum has three main functions: storing feces, preparing feces for elimination, and acting as a passageway for feces to be eliminated from the body.

  • The rectum is a part of the decreased gastrointestinal tract. The rectum is a continuation of the sigmoid colon, and connects to the anus. The rectum follows the form of the sacrum and results in an accelerated phase known as an ampulla wherein feces is stored earlier than its release thru the anal canal. An ampulla (from Latin bottle) is a hollow space, or the dilated give up of a duct, formed like a Roman ampulla.The rectum joins with the sigmoid colon at the level of S3, and joins with the anal canal because it passes via the pelvic floor muscle tissues.

  • Unlike other portions of the colon, the rectum does now not have awesome taeniae coli.The taeniae mixture with each other within the sigmoid colon five centimeters above the rectum, turning into a singular longitudinal muscle that surrounds the rectum on all aspects for its whole duration.

What is the role of the rectum in the human body?

  • The rectum is the final straight portion of the large intestine in humans and some other mammals, and the gut in others. The rectum is located between the sigmoid colon and anus, and functions to store feces prior to defecation. When full, the rectum distends into a rounded shape. The rectum is about 12 cm long in adults. It is slightly shorter, as well as narrower, in children.

  • The rectum acts as a temporary storage website for feces. The rectum receives fecal material from the descending colon, transmitted thru regular muscle contractions called peristalsis.As the rectal walls extend because of the materials filling it from within, stretch receptors from the anxious device placed in the rectal walls stimulate the desire to pass feces, a technique referred to as defecation.

  • An inner and external anal sphincter, and resting contraction of the puborectalis, save you leakage of feces (fecal incontinence). As the rectum becomes extra distended, the sphincters relax and a reflex expulsion of the contents of the rectum happens. Expulsion occurs through contractions of the muscle groups of the rectum.

  • The urge to voluntarily defecate takes place after the rectal stress will increase to past 18 mmHg; and reflex expulsion at 55 mmHg. In voluntary defecation, further to contraction of the rectal muscle mass and rest of the outside anal sphincter, belly muscle contraction, and rest of the puborectalis muscle happens. This acts to make the perspective between the rectum and anus straighter, and facilitate defecation.

What does the rectum affect the human body?

The rectum is a part of the human body that is often neglected. It is not as popular as other body parts such as the stomach or the vagina, but it definitely has an impact on the human body. The rectum affects the human body in a number of ways, some of which are listed below. The first way the rectum affects the human body is by affecting digestion.


Hemorrhoids are swollen veins that bulge inside the rectum and anus. They do not continually reason signs, but when they do, people may additionally experience:

  • bleeding during defecation

  • protrusion of skin throughout bowel actions

  • discomfort, inflammation, or itching inside the anal vicinity

  • ache inside the anal area

  • touchy lumps


Different kinds of contamination can have an effect on the rectum and often result in uncomfortable signs and symptoms, including itching, ache, and proctitis.

For example, someone may additionally gather a sexually transmitted infection (STI) after conducting anal intercourse. This can encompass:

  • anal herpes

  • gonorrhea

  • chlamydia

  • syphilis

Sometimes, using antibiotics can cause bacterial contamination of the rectum. This is because antibiotics can kill the useful bacteria that keep harmful types, such as Clostridium difficileTrusted Source, away. The dangerous bacteria can then overgrow and infect the rectum.

Fungal infections can also affect the rectum and rectal tissues. Examples of fungal illnesses includeTrusted Source:

  • histoplasmosisTrusted Source

  • mucormycosisTrusted Source

  • cryptococcosisTrusted Source

  • candidiasisTrusted Source

Parasites can enter the body and cause damage, particularly whilst there may be bad sanitation. The two mainTrusted Source causes of parasitic infection within the intestine are protozoaTrusted Source, which might be single-celled organisms, and helminthsTrusted Source, which might be worms. Parasites can motivate a rangeTrusted Source of situations that have an effect on unique additives of the intestine, which includes the rectum.

Anal abscess

An anal abscess is a group of pus inside the tissue surrounding the anus or rectum. One normally happens following contamination or blockage. A perirectal abscess takes place within the rectal place, and evidence suggests it may affect around 68,000–96,000Trusted Source human beings in the United States every 12 months. Treatment typically includes a doctor cutting and draining the pus-stuffed hollow space.


Rectal prolapse is a conditionTrusted Source where part or all the rectal wall falls via the anal sphincter, that is the seal that includes the rectal contents. This condition is typically due to a weakening of the muscle groups that support the rectum.

There are three styles of rectal prolapse:

External: Also known as complete-thickness or entire prolapse, the whole wall of the rectum protrudes out of the anus.

Mucosal: Only the mucosa, or lining of the anus, sticks out via the anus.

Internal: Also referred to as an incomplete prolapse, the rectum folds in on itself however does now not protrude out via the anus.


As the rectum stores feces, it performs an critical roleTrusted Source in controlling defecation in addition to retaining continence. So if a person studies muscle damage, nerve damage, prolapse, or scarring of the rectum, it may suggest the rectum is unable to characteristic effectively, that may causeTrusted Source stool to leak via the anus.

Rectal cancer

Rectal cancer is a circumstance where most cancer cells form within the tissues of the rectum. There are not continually signs and symptoms, but rectal cancer can causeTrusted Source:

  • ache

  • adjustments in bowel conduct

  • shiny purple blood in stool

  • leaks of diarrhea

  • constipation

For the health of the rectum in the human body

  • The rectum serves an important purpose in the human body. It is a passageway for feces to travel from the digestive system to the anus. The rectum is also responsible for storing feces until they are ready to be eliminated from the body. When the rectum is healthy, it is able to do its job properly.

To assist keep rectal fitness and prevent rectal conditions, humans can try and exercise desirable anal hygiene. This can encompass everyday bowel movements and practicing safer intercourse. Additionally, life-style changes can help enhance rectal fitness and reduce the chance of rectal cancer. These can includeTrusted Source:

  • retaining a nutritious, balanced food regimen

  • warding off smoking

  • fending off alcohol

  • achieving or preserving a slight body weight

  • workout often

Intestine transplantation

Intestine transplantation (intestinal transplantation, or small bowel transplantation) is the surgical alternative of the small gut for continual and acute instances of intestinal failure. While intestinal failure can usually be handled with opportunity healing procedures consisting of parenteral vitamins (PN), headaches together with PN-associated liver ailment and brief bowel syndrome may also make transplantation the best feasible choice. One of the rarest sorts of organ transplantation performed, intestine transplantation is becoming increasingly everyday as a healing choice because of upgrades in immunosuppressive regimens, surgical technique, PN, and the scientific management of pre and publish-transplant sufferers.
Intestine transplantation can be done in isolation, with liver transplant, or as part of a multivisceral transplant inclusive of any combination of liver, stomach, pancreas, and/or colon. There are excellent differences in affected person and transplant outcomes for gut transplants with and without liver.

Rectum : What is the role of the rectum in the human body

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