Nice people are willing to donate a kidney to a loved one. A man was given the hand of a cadaver. Nice people donate blood.
China allegedly sells organs harvested from prisoners.
Nice people can be and indeed are organ donors and even designate such on their drivers license. During this time the procedure is done at ambient conditions. The blood is then processed and placed in a friendly holding environment for future usage. Now, when a person 'turns up their toes' why not expeditiously drain ALL of their body fluids and do as above. The process that is acceptable at this time is archaic - the cadaver is taken to the embalmer and the fluids drained into the local sewer system where it nourishes any critters therein.