Part one of term paper
The number of people in need of hearts, livers, kidneys, lungs, pancreases, and transplanted cells are in the thousands. The supply of human organs and tissues is and always will be insufficient to satisfy the great needs. Scientists looked in , the transplanting of tissues and organs from animals to humans, as a possible answer to the d ...

Part two of term paper
... that would alter the immune system so that it cannot destroy the transplanted tissue. Research has shown to work in various patients for different time periods, showing a hope for the procedure in the future. Pigs were found to be the best donors in this process. Pigs are easily raised, have similar organs that are comparable in size and physiology to that of humans. Further more, pigs are free from the known pathogens that would put the general human population at risk, and few w ...