The Rectosigmoid Junction is the area of your large intestine where your sigmoid colon and your rectum meet.
The rectosigmoid junction is located between the sacral promontory and the lower margin of your second sacral vertebra.
Your rectosigmoid junction guards against descending colon contents that pass directly to your rectum.
The rectosigmoid junction is a high pressure location which connects different muscles, neurological systems and vascular anastomosis.
Your rectosigmoid is what serves as a storage area where stool or poop water is further recovered through absorption.
The contraction and emptying of your descending colon and rectosigmoid are stimulated by eating.
And in your rectum, your pelvic floor muscles (levator ani, puborectalis) regulate fecal retention and defecation.
An adult human rectum is about (4.7 in) long, and begins at the rectosigmoid junction, which is the end of the sigmoid colon at the level of the third sacral vertebra or the sacral promontory depending upon what definition is used.
Your large intestine or colon has one primary role, which is water and electrolyte absorption to concentrate your poop.
The large intestine plays little role in your metabolism and people can live full lives without their large intestine.