FA GIT, pg 305 , mistake?

[NoWayOut]

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I was looking at pg 305 in FA 2010 and noticed that for the hindgut structures..under structures supplied by the IMA, they did not include the entire rectum and upper part of anal canal. "distal 1/3 of transverse colon to upper part of rectum" (not anal canal).

Is this correct?
According to wiki:

http://en.wikipedia.org/wiki/Human_gastrointestinal_tract

the entire rectum (not just upper) and the upper part of anal canal is supplied by the IMA.

So is this a mistake in FA?

 

[knuckles]

http://en.wikipedia.org/wiki/Anal_canal

The anal canal is divided into two halves, upper and lower.

• The upper half has longitudinal folds or elevations of tunica mucosa. Its mucosa is lined by simple columnar epithelium. Its lower ends are joined together by folds of mucus membrane called anal valves. The upper half of the anal canal is supplied by the superior rectal artery which is a branch of the inferior mesenteric artery.

• The lower half of the anal canal is lined by stratified squamous epithelium that blends with the skin. The lower half of the anal canal is supplied by the inferior rectal artery which is a branch of the internal pudendal artery.

 

[NoWayOut]

Thanks.. I think they should have wrote " distal 1/3 of transverse colon to the upper portion of rectum, including upper portion of anal canal" but I see that they did seem to mention the blood supply of the anal canal on pg 307.
Thanks for the clarification.