<P> Organ donors may be living , brain dead , or dead via circulatory death . Tissue may be recovered from donors who die of circulatory death , as well as of brain death -- up to 24 hours past the cessation of heartbeat . Unlike organs , most tissues ( with the exception of corneas ) can be preserved and stored for up to five years , meaning they can be `` banked '' . Transplantation raises a number of bioethical issues , including the definition of death , when and how consent should be given for an organ to be transplanted , and payment for organs for transplantation . Other ethical issues include transplantation tourism and more broadly the socio - economic context in which organ procurement or transplantation may occur . A particular problem is organ trafficking . </P>
<P> Organ donors may be living , brain dead , or dead via circulatory death . Tissue may be recovered from donors who die of circulatory death , as well as of brain death -- up to 24 hours past the cessation of heartbeat . Unlike organs , most tissues ( with the exception of corneas ) can be preserved and stored for up to five years , meaning they can be `` banked '' . Transplantation raises a number of bioethical issues , including the definition of death , when and how consent should be given for an organ to be transplanted , and payment for organs for transplantation . Other ethical issues include transplantation tourism and more broadly the socio - economic context in which organ procurement or transplantation may occur . A particular problem is organ trafficking . </P>
what are the two types of organ donors
what are the two types of organ donors
living brain dead
living brain dead