Or you could just make your own decision based on how you feel. That's probably easier. Every vegetarian has their own values, we can't tell you how to feel.
One wonders how far across the room the OP's brain particles will reach when it explodes trying to compute and reconcile the different answers that are posted.
I have recently become vegetarian. At my school, we have an opportunity to dissect a squid, and I'm not sure if it goes against the morals and ethics that I hold due to being vegetarian. Before becoming vegetarian, I dissected a heart and a kidney, and if I was offered the opportunity to do it again, I might accept. The animal was killed to be eaten, and those organs are the 'leftovers', so it is surely at least better not to waste parts of the animal. However, this will be a whole squid. A squid that was killed to be dissected. So I'm not sure if dissecting it goes against my moral and ethical grounds. Help!