What are the benefits and drawbacks of research on animals?

there are many atvantages and drawbacks when you test on animals I personaly don't like that we test on them anyway but we do. here are some points PROS * no humans are harmed * if you test on an animal very close to the human you can find side affects that might happen to humans * there are lots of animals so you can try the test over and over again * might find out more about humans CONS * animals may be harmed * animals may be harassed * dagerous chemicals can kill the animals * even with many animals if you test alot of them my go exstin so as you see research on animal is good yet bad but we do it any wya