What is the rectum?
The terminal part of the large intestine is called the rectum. It is located between the sigmoid large intestine and the rectum. The entire Latin name Rectum is rectus intestinum , which means "straight intestine". It is part of the digestive system, the main function of which is to store digestive waste until one is ready to defecate.
In humans, the rectum has a length of about 4 to 6 inches (10 to 15 cm). At the intersection between the sigmoid large intestine and the rectum, the perimeter has about 6 inches (15 cm). The circuit increases to about 14 inches (35 cm) in the rectal ampulle, which is its terminal part. This ampulla looks like a pear or balloon and provides a large storage capacity. This expansion stimulates stretching receptors placed on the walls, which in turn causes an involuntary urge to empty. During defecation, the increased pressure of the rectal walls forces the anus to open. Like the drivers that affect food in the rest of the gastrointestinal tract, peristaltic waves also affect the feces. Peristaltic mechanism associated with zBy shortening the rectum leads to successful defecation.
If the person does not hold the urge to defecate, the rectum reacts by returning the waste material to the sigmoid large intestine, where other water absorption occurs. If a person ignores the urge to defecate for a longer period of time, too much water is reabsorbed from the waste materials. The final results are hardened stools and problems with defecation or constipation.
rectoanal junction is called anorectal line or pectinate line. Above this line are different parts of the rectal mucosa called Morgagni columns or simply rectal columns that are able to conceive contractual or expansion forces. Pectinature is important in the classification of hemorrhoids. If the hemorrhoid is located above the pectinate line, it is called an internal hemorrhoid that is painless. The hemorrhoid located under the pectinate line is called the external hemorrhoid, which is often painful.
may occura rectal prolapse or "mick" that causes the rectal walls to collapse into the rectum. Rectal prolapse occurs when the support ligaments and muscles weaken, and also when there is increased pressure inside the pelvis. Rectal prolapse occurs in conjunction with age, prolonged constipation, frequent diarrhea, pregnancy and nervous problem. In serious cases, the entire rectum of the rectum stands out, who must be surgically repaired.