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:  Here we have investigated the potential involvement of the Src - like adapter protein ( SLAP - 2 ) in signaling by the CSF - 1 receptor in mouse bone marrow - derived macrophages .
A:
bone