Complex sentence: He was the son of Jean d'Amboise, ordinary surgeon to the king and was himself surgeon to Henry III, and got himself noticed when he dissected a woman before Ambroise Paré and several grand-masters of surgery aged only 20.
Split into simpler sentences: He was the son of Jean d'Amboise, ordinary surgeon to the king. Jacques was himself surgeon to Henry III, and got himself noticed when he dissected a woman before Ambroise Paré and several grand-masters of surgery aged only 20.