Bill Gates showed how he experimented on a cow lung as a fourth grader while introducing his memoir Source Code.

The controversy stems from the daunting immunological barrier to transplanting organs between disparate species and from the possibility that an animal organ or tissue might transmit an infectious ...

Cells are the smallest unit of life. Cells in multicellular plants and animals are arranged into tissues, organs and organ systems. Cells. Tissues. Organs. Organ systems. And the organism itself.

Scientists have already transplanted pig organs into monkeys, baboons, and dead humans who'd donated their body for research, but transferring animal organs into living human recipients – or ...

Why must they? What cells and specialized organs make such crypsis possible for one of the older evolutionary groups of animals? Chromatophores are organs that are present in the skin of many ...

Steve Wood The surgical team at the University of Alabama at Birmingham. Using animal organs in the human body is an old idea, and has ranged from "zest for life" chimpanzee testicle implants to ...