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.

 RT - PCR analysis revealed constitutive expression of the SLAP - 2 gene in bone marrow macrophages .
bone

 ( B ) Real - time PCR was performed on total RNA samples from the human brain regions known to express MOR1 .
brain

 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 .

eye