I, like you, had no idea what to expect before taking Gross. I was very fortunate that in my occupational therapy program, we we able to take Gross Anatomy (our FIRST class of the program..it initiates you into the program...) Our professor spent much of the first lab explaining the legal contract the cadaver's families had with the medical school (who gave us the cadavers) and how we needed to respect those bodies because they were a donation to science. He was able to give us a very limited H&P about each cadaver (i.e. age of death, active/nonactive). He then explained how we were to use them for education but to understand that within 6-7 months, the bodies were to be given back to the medical school so that they could be cremated and the ashes given back to the families.
Good tips to remember: (1) Have a lab coat that you keep only in the lab to prevent any formaldehyde/fluid/tissue from getting on your clothing. (2) Have a reference Anatomy book that you keep in the lab because you will be flipping pages with messy, gloved hands and you don't want to take home to study from at night. (3) Vicks Vaporub was very useful to many of my classmates to keep the formaldehyde smell from irritating them during the long labs. Just rub a little on your upper lip before lab starts and you smell menthol the whole lab...
The first day was scary when we first saw the bodies, but, yes, their heads are covered (until you begin dissection of the face and brain). Within a day or two, that apprehension wears off and you understand the amazing experience you have to fully learn from a human who has so selflessly given their body for your education. It was by far the most educational, interesting class I have ever taken. We had cadavers that had tatoos, obese people and skinny, and a man who had had a quadruple bypass (very interesting to compare with the people who did not have artery grafting!) This will be your once in a lifetime chance to learn everything you wanted to learn from a human body so endulge yourself in it. I, myself, am excited that if I am to become a doctor, that I will get to experience that class once again.