"Systems biology" is a phrase that gets thrown around a lot, though it never seems to be completely clear what it actually means. Wikipedia defines it as: "Systems biology is a relatively new field that focuses on the systematic study of complex interactions in biological systems" What do you think this means? If you had been writing the wikipedia article, how would you have defined it? Use of the word "systems" in the life sciences seems to be pretty inconsistent. For example, when I hear "systems biology" I think of genomics. However, when I hear "systems neuroscience" I think of electrophysiology. The former studies things much smaller than cells and the latter studies networks of many cells. Though naively from hearing the names you would probably think that systems neuroscience was a subset of systems biology.