I thought EMT-B/EMR anatomy was extremely superficial. Even my EMT/EMT-I anatomy lectures are nowhere near as in depth as my undergrad A&P stuff, so I wouldn't bother cramming all the info from an undergrad A&P textbook into your head.
My biggest advice for EMR/EMT-B is to simply keep up with the readings and lecture and
use common sense for scenarios. Most of the people I come across have heard the story of one EMR candidate who kept trying to give an unconscious diabetic oral glucose and then figured the best way to do it was to squirt it down the OPA...lol.

h34r::wacko:
But really, it's just advanced first aid, the only major extra things you get to do is to use airway adjuncts and oxygen, do vitals, and administer a very small # of medications (generally only if the ER doc is breathing on the other end of the phone line, although lucky me, I get to administer aspirin w/o medical supervision...but not Gravol, which is a paramedic drug here, lol) - there is really nothing in that class that should go over your head as long as you have some basic study habits.