Comment Re:Is it necessary the vien come from a dead human (Score 4, Interesting) 169
About a few hundred reasons, the most important of which are
1. the much larger likelihood of an immune reaction to the collagen-elastin matrix. Human collagen =! Cattle collagen , mainly in terms of glycosylation etc.
2. Large blood vessels of the body have some degree of specialization, they aren't just pipes. Finding an anatomically compatible cattle vein can be a problem, what with cattle liver being a completely different shape and all that.
3. As a matter of principle, you really don't want to expose cattle pathogens deep into the human peritoneum, it only encourages them to jump species. and before you say Sterilization, remember that is only a probabilistic process which you can't do too much of non-destructively.