Illustrations are an important part of many textbooks and peer reviewed papers because they can help explain concepts in ways that photographs can’t. According to Joanne Haderer Muller, a board certified medical illustrator and Chair of the Board of the Association of Medical Illustrators: “Illustrations have many advantages over photographs. For example, illustrations can show readers an average, rather than a specific, example of a concept, procedure, animal, or anatomical arrangement. They can show detail that may be lost or hidden in a photograph, can help explain things at a molecular or cellular level, and can show how a process unfolds over time to really explain the author’s message.”