As a research tool, histology can provide genetic clues to which genes can be ‘switched on’ or ‘knocked out’ (this field of study is called genomics) to alter a person’s susceptibility, or resilience to a particular type of disease such as diabetes. Analysis of the pancreas and the way it manufactures insulin on a genetic level is an example of how histology can be used to further enhance our understanding of degenerative diseases, and how they affect our daily lives.