Q: In this task, you will be given sentences in which your task is to recognize the name of the organ of the body. An organ is a collection of tissues that structurally form a functional unit specialized to perform a particular function. Although there might be several correct answers, you need to write one of them.
 Furthermore , when ACT is overexpressed in transgenic mice , an increased plaque load in the brains of these mice and impaired spatial learning is observed [ 134 , 135 ] .
A:
brains