Fathers of Biology

Biographical sketches of Hippocrates, Aristotle, Galen, Vesalius, and Harvey examine their lives and writings, showing how observational methods, dissection, and theoretical reasoning advanced understanding of disease, anatomy, embryology, and circulation. The text juxtaposes personal background, major works, and medical theories such as natural causes of disease, epigenesis in development, anatomical description, and experimental physiology, tracing a progression from religious and superstitious practice toward empirical, systematic investigation. Concise chapters and contextual commentary aim to render early anatomical and physiological ideas intelligible for readers seeking a historical perspective on biological thought.