Complex sentence: He became interested in surgery through several premed classes he attended in college and began his medical education at the University of Texas Medical Branch in Galveston and went on to complete his medical degree and his surgical training at Johns Hopkins School of Medicine.
Split into simpler sentences: He became interested in surgery through several premed classes he attended in college. He began his medical education at the University of Texas Medical Branch in Galveston and went on to complete his medical degree and his surgical training at Johns Hopkins School of Medicine.