Biomedical Science Guest speaker

I’m a junior in high school and take biomedical science. We have had two guest speakers in the last month for our forensics unit. I have seen so many pictures of dead bodies in that class, but our most recent speaker showed us a picture of an oral gunshot suicide victim. The upper half of his face was completely blown off. He also almost showed us a picture of a woman who had hung herself. I saw a glimpse of the hanging one. I can’t get those images out of my head. I get that it’s for education, but do they really have to show that?! Like, at what point is it just for a shock factor instead of education? I’ve told my dad about this and he doesn’t think that it was okay for the speakers to show what they showed us. I have a therapy appointment on Wednesday morning, so I’m gonna talk to her about it because it’s actually making it hard for me to sleep when those images are stuck in my head.