Read Campana's post, but to add a few things:
The year of bio labs are part of the 8 credits schools want (2 credit hours of labs): 2x 3 credit hour lectures + 2x 1 credit hour labs is how they get the 8 credit hours.
As for the anatomy class, make sure it is an upper-level course (300+), and not a 200 level class like many (most?) anatomy classes are. Seeing as how grad students are in it, it might be a 300 or 400 level course, I can't tell. Also, compare it to the regular BIO XXX course level.
Definitely make your advisors happy - you do not want a bad committee letter.