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The rectum :
Is related anteriorly to the cervix
Has a venous drainage into the superior vena cava
Begins infront of the 1st sacral vertebra
Has a lining of stratified squamous epithelium
ANSWER : 1
Descrption
<p>The rectum is the final straight portion of the large intestine in humans and some other mammals, and the gut in others.</p> <p>The adult human rectum is about 12 centimetres (4.7 in) long, 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.</p> <p>Its caliber is similar to that of the sigmoid colon at its commencement, but it is dilated near its termination, forming the rectal ampulla.</p> <p>It terminates at the level of the anorectal ring (the level of the puborectalis sling) or the dentate line, again depending upon which definition is used.</p> <p>In humans, the rectum is followed by the anal canal which is about 4 centimetres (1.6 in) long, before the gastrointestinal tract terminates at the anal verge. The word rectum comes from the Latin rectum intestinum, meaning straight intestine.</p>
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