Hey LifeSciences,
MUGSI will let you do it but personally, you need to consider some things:
I did this last year and it worked out for me but only because I did my research and worked hard. You have to try to look for the course outlines for the courses or ask people what the course structure was like.
1) Will you be able to handle the self-learning? Personally, it was hard for me to put aside time to learn the content of the course I didn't go to all semester. Since the lecture wasn't recorded, this was very hard. University courses are more difficult than anything you may have done in high school and learning things on your own, although sometimes an unfortunate necessity, takes a lot of time.
2) There will be some courses with participation marks/iClicker questions (iClickers are small quizes that may count for marks during lecture) and if you are planning on missing a course like this, you will have to give your iClicker to someone else and trust that they will submit correct answers (if the Iclicker is worth marks - again, you will have to check the course outline for this).
3) As mentioned above, if you have midterms for these courses that are traditionally during class (also something you can find out from previous years/course outlines), then you don't want to take the risk.
4) What is your health sci tutorial? There are some health sci tutorials that you can get away with not going to, but this also depends on the class and how understanding your group is. If it's psychobio (which is the only tutorial I had in first year for healthsci), you COULD POTENTIALLY rely on your group to relay information to you. However, if your group wants to meet at that time and discuss things, then, you'll be out of luck. You'll probably want to talk to them about this.
Anyway, just some thoughts. If you want to share what two courses you are having a conflict with, I could probably provide more insight. Otherwise, good luck with your predicament!