Yes, zigzag, I would have been okay with no hair at all, as it is largely an internal diagram, showing the baby. But to show hair, but groomed into a tiny strip, sends such a damaging message. There was some TV show a few years ago where teen girls talked about how they felt about their bodies and they largely said they felt shit, due to all the unrealistic images in the media and on instagram etc. And now it's in their science textbooks too.
I don't think there has been a response from Pearson, but I think I will send them an email about this. I think it needs to be taken seriously. If adults want to groom their pubic hair in this way, that's fine, but girls need to be taught that it's not the norm and it's not expected. That's why I liked the Guardian vulva project because most had pubic hair (which I think reflects reality, even among the younger generation, because you have to be quite rich, have a high pain threshold, and time on your hands to keep up a perfect landing-strip).
Invisible yes, that was Victoria Bateman. I was disgusted by the comments, including from middle-aged men (who would have grown up in a time when natural pubic hair was the norm), who said she was untidy, gross and a gorilla.