rogercamel Mon Feb 22, 2010 1:17 pm
The placenta does become redundant after the birthing process has been completed, and every time pregnancy starts again another one is produced. Faecal matter also contains transport substances to ease the passing of waste, same with urine, the body doesn't need to get rid of the water, but it does so because otherwise it couldn't get rid of the waste involved (I'm assuming this here, but I'm pretty sure its right, feel free to correct). I would generally find it hard to term non-damaging auto-cannibalism really as proper cannibalism. Wikipedia (unreliable source to begin with) says that any self ingestion is included in this term including swallowing hair, nails, etc. I'd say that placenta is on the borderland of auto-cannibalism, given that unlike most forms of intentional auto-cannibalism it is not self damaging, the part that is consumed was not forcibly and unnaturally removed from the body.
So technically yes, it is cannibalism by the truest definition of the word. But whether or not it is the same as we perceive cannibalism to normally be... basically eating people, it would be much more up for debate.