The manual had been assembled from mismatched sources over the years, so the visual language shifted from page to page. Repeated scanning had degraded fine details, leaving unclear shading in areas where precision mattered most, like vessel branching and organ boundaries. Instructors had flagged inaccuracies for years, but without a unified source file, students were left interpreting anatomy through diagrams that didn't always match what they saw on the table.

I sat through the course again as a student, tracking where visual confusion actually happened, not just where the old diagrams looked outdated. Using published references and direct specimen observation, I rebuilt each illustration to standardize line work, shading, and labeling across all diagrams. Every draft went through multiple iterations with the instructor for anatomical precision, then with students mid-course to confirm the diagrams matched what they were seeing.

Students gained one cohesive set of diagrams they could trust, replacing a patchwork that had quietly caused confusion for years. The instructor now had a source file that could be corrected and expanded going forward, instead of relying on scans. More broadly, the project showed how illustration quality directly shapes comprehension in hands-on science education, where an unclear boundary can affect a student's understanding of anatomy itself.