How did Vesalius accept the challenge of Galen?

Andreas Vesalius accepted the challenge of Galen by rigorously dissecting human cadavers, a practice that contradicted Galen’s reliance on animal anatomy for his medical teachings. Vesalius meticulously documented his findings in "De humani corporis fabrica," illustrating anatomical details that corrected many of Galen's errors. His empirical approach emphasized observation and direct study, laying the foundation for modern anatomy and challenging the long-held authority of Galenic teachings in medicine.