How does your body work? Most people have a vague idea about how their body functions. Biology and health class in school, a little bit of general knowledge, and a handful of fun facts. For a doctor or other medical professional it is crucial to know the details though. Your anatomy must largely be known to them. And where most people’s anatomy doesn’t differ much, there are exceptions. People are born with more or less organs than usual on a fairly regular basis. That can be difficult. Both for the patient and the doctor.