Abdominal organs can be transposed side to side (situs inversus)... I have a patient with situs inversus of the heart... On the times I have had a student in the office I might casually say, "Check her heart murmur and see how it is doing today." The looks in their faces are priceless as they frantically search all over the left side of her chest trying to hear the "murmur" (she doesn't have a murmur)...