These are the knitted dissected animals crafted by Emily Stoneking of Etsy store aKNITomy. You can buy patterns to knit your own for around $4 apiece, or actually buy one Emily knit herself for $95+. I don't know how to knit, so I'm stuck buying one. I mean, unless one of you wanted to make me one out of the kindness of your heart. A heart I promise not to cut you open and remove. I remember in high school biology we had to dissect an earthworm, a frog, and a fetal pig. Unfortunately, I don't remember learning much except I loved the smell and my lab partner Billy Salem put the pig in his backpack to take home when class was over. I thought he was joking about roasting and eating it. Watching Billy step off the bus that afternoon was the last we ever saw of him.
Keep going for a bunch more shots including a bat and a worm and an alien.
Thanks to Matt, who agrees they should teach you the important stuff in high school biology like what's the right direction to twist a nipple to turn your lover on.