The second year of medical school is all about everything that can go wrong with the body. This means courses in pharmacology, pathology/pathophysiology, microbiology and an introduction to clinical medicine. As you can tell there is not a whole bunch of patient contact in the first two years of medical school.
The differences between an ATV and a UTV become clear with a simple glance at the rider positions: an ATV rider will straddle the vehicle on a saddle, while UTV riders can sit on side by side on bench seats or bucket seats. The steering differs between the two as well.
ATV refers to All Terrain Vehicle. It is also known as three wheeler, four wheeler, quadricycle, quad and quadbike. They are used by single operators. It is designed in such a way that it can handle wider variety of terrain.