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.

A study revealing safety and ethical concerns over using animal organs in lifesaving ... altered pigs whose organs would not be rejected by the human immune system could help solve the current ...

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 ...

An all-in-one two-photon and/or confocal microscopy system called intravenous microscopy (IVM) was created and refined for in ...

A research team in Japan says it has successfully transplanted a pig kidney into a monkey, marking a step toward advancing to ...