What are the minimum organs a human needs to be alive?

To be alive, we need our brain, a part of a lung with airways and blood vessels, our heart and the blood vessels leading to and from the organs, liver, 1 to 1. read more

To be alive, we need our brain, a part of a lung with airways and blood vessels, our heart and the blood vessels leading to and from the organs, liver, 1 to 1.5 m of the middle part of the small intestine we call the Jejunum, a part of a kidney, bone marrow and at least a part of our chest skeleton and the muscle mainly the diaphragm to be able to breath. read more

There are some clear examples of organs that can be removed w/o immediately causing death with varying degrees of medical intervention but you could likely keep any small amount of human tissue alive for weeks in the lab so the answer would be all of them except for that piece* (lots of medical intervention required). read more