Acid Reflux (GERD) Illustrations

These illustrations were made for a clinical case study modules on acid reflux, commonly known as GERD (gastroesophageal reflux disease). The first illustration shows the most common type while the second illustration shows how gastrin secreting tumors can cause GERD symptoms.
Anatomy modeled and rendered in ZBrush, figure linework done in Illustrator and Photoshop.