Experimental mouse. Gloved hand holding a nude breed of mouse, Mus muscula, which has been specially bred for use in medical experiments. This mouse does not have a functioning thymus gland, meaning that some of the cells in its immune system cannot mature. These T cells would normally attack foreign tissue and regulate the activity of other types of immune cells. Due to its deficiency, this mouse can have samples of cancer-causing chemicals (carcinogens), human tumours or skin tissues transplanted into its body. The development of any cancers, and the effect of drugs upon them, can then be observed.
February 17th, 2021
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