Detailed Instructions: 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.
Q:  Chidlow , Le Corre and Osborne [ 28 ] have recently demonstrated that , in section taken through the whole eye and ciliary body , prominent 5 - HT1A and 5 - HT7 receptor messenger ribonucleic acid signals were obtained .
A:
eye