Oh, wow. A few years ago I actually posted a question about that on Biology.SE: https://biology.stackexchange.com/questions/3263/do-mosquitoes-need-to-pump-bloo

Oh, wow. A few years ago I actually posted a question about that on Biology.SE: https://biology.stackexchange.com/questions/3263/do-mosquitoes-need-to-pump-blood-out-of-the-host https://biology.stackexchange.com/questions/3263/do-mosquito...