The splenic flexure lies in the upper left quadrant between the
transverse and descending colon.
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Lage Intestine
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I think you must be asking about Splenic Flexure. The splenic (or left colic) flexure is a sharp bend between the transverse and the descending colon in the left upper quadrant of humans.
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The Transverse colon is between both flexures
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The bend in the colon between the transverse and descending
parts. The other flexure (between ascending and transverse)
is the hepatic flexure.