Of course, I don't mean that dead people make the choice, but in life, why can't they not sign some sort of thing, like they do for organs? A student of mine asked this question today at school, because there is going to be a blood drive this Friday. I sincerely told him, you know, I do not know, but I will figure it out. So don't go ahead and answer "Cuz they're dead" cuz that is just silly.
2007-10-23 09:47:55 · 12 answers · asked by LumiereLady 2 in Science & Mathematics ➔ Biology
I imagine its because when we're dead we don't take in oxygen so the blood cells have nothing to carry. in a live person the blood is full of oxygen which is how its meant to be and healthy. Though that is a very good question - especially if they were hooked up to a ventilator which would disprove my theory.........hmm! I'll be back, have a star!
*Later*
Ok my second theory is that the heart, whilst beating pumps blood around the body although there is very low pressure in the veins it is still enough to move the blood around, hence why when we give blood it is not sucked out, just redirected. Obviously if you are dead there is no heartbeat, blood must stay fairly stationary in the body where i imagine it begins to clump and form clots fairly rapidly. :)
2007-10-23 09:52:29 · answer #1 · answered by LipglossScientist 4 · 2⤊ 0⤋
Red cells die off very quickly once a person expires, that much I do know. I've seen where people have expired but are kept on a ventilator/life support to help keep the organs viable until the harvest team can get there to harvest organs. I've set up and issued blood for this purpose; basically to keep the organs viable until harvest. I think it is safe to postulate that even though the donor is on life support, machinery is keeping the organs oxygenated, there is still catabolism and the by products from that would eventually build up. That is probably why the organs must be harvested quickly for use. I could see where the viability of red cells would be of question and why they wouldn't be used.
2016-04-10 00:21:44 · answer #2 · answered by ? 4 · 0⤊ 0⤋
blood from dead people are not allowed to be donated or transfused to a living person for many reasons:
*the body may be already contaminated with virus and bacteria
*the person may have suffered illnesses that lead to his/her death. so, if the blood is tranfused, there is a great possibility that the patient might acquire the same illness.
*the blood from a dead person is not anymore fresh.
2007-10-24 02:29:23 · answer #3 · answered by jaysonleighs 1 · 0⤊ 0⤋
It's probably because there hasn't been oxygen going through it to make it healthy so the blood kind of dies with the body like it would probalby make the person who needed it worse and get really sick
2007-10-23 15:14:07 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Probably because they are not donors and they only have carbon in their blood. The carbon is considered dirty blood wheres oxygen rich is clean. The persons disease might interfere too.
2007-10-23 14:22:57 · answer #5 · answered by NarutoFreak1589 2 · 0⤊ 0⤋
EEEWWWWW!!! grose I think its becase of all the germes, or because the white blood cells have died.
or maybe the blood cell nucleolus dies with the body unlike orgins which take longer to deca.
2007-10-23 13:53:51 · answer #6 · answered by dragon fire 2 · 0⤊ 0⤋
As you die there is a chemical released that tells every cell in your body to decompose. Blood looses it's ability to absorb oxygen and basically dies itself.
2007-10-23 10:00:07 · answer #7 · answered by dude 7 · 3⤊ 0⤋
bcuz the blood cells are dead and dry!
2007-10-23 21:40:19 · answer #8 · answered by engelton p 2 · 0⤊ 0⤋
it's because ur blood nolonger circulates and there is no oxygen since your heart aint pumping
2007-10-23 11:13:00 · answer #9 · answered by ashley a 1 · 1⤊ 0⤋
http://en.wikipedia.org/wiki/Cadaveric_blood
google: human cadaver blood transfusion
to find more articles
2007-10-23 09:57:02 · answer #10 · answered by Anonymous · 3⤊ 0⤋