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Vivisection (from Latin vivus, meaning alive, and sectio, meaning cutting) is surgery conducted for experimental purposes on a living organism, typically animals with a central nervous system, to view living internal structure.
Fine-needle aspiration is a diagnostic procedure used to investigate lumps or masses. In this technique, a thin, hollow needle is inserted into the mass for sampling of cells that, after being stained, will be examined under a microscope. The sampling and biopsy considered together are called fine-needle aspiration biopsy or fine-needle aspiration cytology. Fine-needle aspiration biopsies are very safe, minor surgical procedures. Often, a major surgical biopsy can be avoided by performing a need