The Persian Zoroastrians had taboos about blood as well, viewing it as the vehicle of life and yet impure once removed from the body. It has been suggested that the specfic Jewish Kosher and menstruation laws evolved from the Persian superstition. This is quite reasonable given how much of their theology derived from Zoroasteriansm.
Blood and Food
" As someone who worked in the meat trade for 25 years, I can tell you that Black Pudding didn't contain "traces of blood" it was practically all blood. "
Yewww - stuff biblical laws - that's enough to put anybody off.
There was a question from readers about this or something similar. The brothers maintained that if all efforts to bleed the meat properly had been made, that the blood cells remaining were insignificant. They said the point was that you or someone made the effort to bleed the animal properly.
I think you're right FlyingHighNow. I believe it's meant to be a symbolic gesture to God that you respect life. I remember our doctor once questioning why we could eat meat and not take blood.