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:  The data suggest that an intra - abdominal abscess , especially when contaminated with gram - negative bacteria , induces mRNA - generated cytokine responses in the abscess wall that are related to increased portal venous levels of the inflammatory cytokines TNF - alpha , IL - 1beta , and IL - 6 perfusing the liver .
A:
liver