Ülo Hussar, Estonian histologist, educator. Achievements include discovery of circadian biological rhythms in mitotic division of thymolymphocytes; first to experimentally the importance of perichonder in post-traumatic bone repair. Head Society Estonian Anatomists, Histologists, Embryologists, Tartu, 1983—1999; Member of Society Ecology, Toxicology of St-Petersburg.
- Assistant Histology and Embryology, University Tartu, 1974—1977, professor, 1977—1998, professor emeritus, since 1998. Head department anatomy University Tartu, 1989—1998.