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Anus

Anus


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Please check my work?

... Members of the subphyla Urochordata and Cephalochordata are chordates although they lack A a backbone. B pharyngeal pouches. C a notochord. D an anus. is it A? Three common characteristics of adult vertebrates are A skull, notochord, and complex organ system. B backbone, segmentation, and open ...

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by radicali
Thu Jun 14, 2012 8:57 pm
 
Forum: General Discussion
Topic: Please check my work?
Replies: 1
Views: 1330

Evolution of the Face and Head

Imagine a very simple creature: Something with a blind gut (one opening is mouth and anus), like a jellyfish. After the evolution of a true gut, with mouth and anus, animals gain a front and rear end (movement now is not random, but mouth-first). The most usefull ...

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by stauffie
Mon May 07, 2012 12:42 am
 
Forum: Evolution
Topic: Evolution of the Face and Head
Replies: 4
Views: 1661

Re: Blood from the anus

Many diseases and conditions can cause rectal bleeding and toilet paper is not the main one. Common causes include: anal fissures, hemorrhoids, cancers and polyps of the rectum and colon, diverticulosis, abnormal blood vessels (angiodysplasia), ulcerative colitis, ulcerative proctitis, Crohn's colit...

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by Paula78
Mon Aug 29, 2011 5:28 am
 
Forum: Human Biology
Topic: Blood from the anus
Replies: 16
Views: 75703

Re: Theories - Origin of Life

... engaging in your rather rash rhetoric. Now design meets even your requirements. Lets take the digestive system of say, yourself. From teeth to anus there is purpose is there not. You know the food intake goes into your stomach, gets digested, produces the necessary fuel to power the cellular ...

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by scottie
Tue Jun 07, 2011 4:15 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 548
Views: 534416

Re: fiber/hair moving thru water

... However, it's the crawling on my head that is driving me nuts and I feel like the crawling may be unrelated to the bugs that bite my feet, ankles, anus and back. I mostly want to know what the issue is so I can accept it and stop going nuts wondering what the heck is on me and always wondering ...

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by Maragoldie
Wed May 04, 2011 5:20 am
 
Forum: General Discussion
Topic: fiber/hair moving thru water
Replies: 17
Views: 7223
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