Instead, I’ll let the Vagina Museum talk about spider vaginas (actually, they’re called epigynes…oh crap, I did it anyway.)
Very few people are interested in spider epigynes, so here, here’s a whole article about vaginas. They’re rather nifty organs, you know, with many different names.
Hah! You probably thought I was going to list a bunch of slang terms, didn’t you?
How about if I show you pictures of vaginas instead?
I’m sorry to say that humans are pretty basic — no spermatheca at all. I’m pleased that they also lack sclerotization, at least.