I agree with Guile, though you must know that is not the worst of it, if you are in either anatomy or neuroanatomy/neural science, you are going to have to know useless crap like
nerve root (in addition to blood supply) for conditions like waiter's tip /claw hand/ raised middle finger (the last one was a joke anyhow you get the picture). Just make yourself get used to it, spend more and more time...