Mark Nielsen is a Professor in the Department of Biology at the University of Utah. For the past thirty-five years he has taught anatomy, neuroanatomy, embryology, human dissection, comparative anatomy, and an anatomy teaching course to over 28,000 students. His graduate training is in comparative anatomy, and his anatomy expertise has a strong basis in dissection. He has prepared and participated in hundreds of dissections of both humans and other vertebrate animals. All his courses incorporate a cadaver-based component to the training with an outstanding exposure to cadaver anatomy. He is a member of the American Association for Anatomy (AAA), the Human Anatomy and Physiology Society (HAPS) of which he is the past president, and the American Association of Clinical Anatomists (AACA).