The background & floor makes me think of the walls of veins, or red blood cells. Upper left makes me think of Pyramid Head. Upper right is the chic that got her flesh ripped off, by Pyramid Head. Center right, the female holding up what looks to be a follicle, is Alice Kriege- Alyssa's mother. The "cubes" & "vents" in the background, to me, symbolizes a shifting. A change in things natural. Lower center are the nurses, & the vulgar one dragging it's tongue looks to be the one from the bathroom that came off the toilet slinking towards the main character.
I hope I didn't offend. Just like this is special to you, that movie is to me. It says alot of things about the human nature, & makes me think. I like things that make me think.