I have taken a A&P (PLUS labs) via online courses. The labs were done via an interactive CD-ROM program. These courses were from REAL colleges that offered online clases, not like U of Pheonix or Walden University (which are online universities). The funny thing is that this same class is also offered on campus at the college, and the people who take it online have no different a transcript than those who took it on campus. AACOMAS and med schools accepted these classes just fine.
You should check out the SUNY Learning network (do a Google search). It lists all New York State REAL colleges/universities that offer online classes (meaning although you take the class online, your transcript will list it as a regular class taken on the campus). They offer tons of natural science classes. However, I would not recommend taking your science pre-reqs online, since you just will not really learn as much as if you took it in a classroom, in my opinion.
Good luck!