The white head snarled. The two-headed dog, no freak of nature, was the latest product of Surgeon Vladimir Petrovich Demikhov, chief of the organ-transplanting laboratory of the Soviet Academy of ...
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.
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