For some reason I recently remembered an animation that I saw on TV at some point when I was a child. I only ever saw it once and don't remember when, but it was probably before the mid 90s. Here are all the details I remember:
There was a space station made out of two hemispheres with a gap between them. I think it otherwise had a smooth surface, and looked much like the cowbells painted by René Magritte.
By René Magritte - https://www.guggenheim.org/artwork/2593, Fair use, https://en.wikipedia.org/w/index.php?curid=53815146
I perceived it as a cartoon drawn in a "serious" style. From what I remember of the style this might mean it was an anime (dubbed into English). However, as a child I didn't really know the difference between Japanese animation and other styles, so I'm not sure of that.
There was a girl who was in some strange environment consisting of a series of organic-looking tubes that she had to climb on. From the imagery it could be that she had been miniaturised and put into someone's body (maybe the brain) but I don't remember thinking it was that at the time.
There were some adults who could talk to the girl by voice. They were in a laboratory type environment, possibly on board the space station.
At one point the girl was hungry, and the adults directed her to find a "strawberry" in order to eat. This turned out not to be a strawberry but a weird organic form that was bigger than she was. She had to do something to extract food from it I think.
I think the end credits showed the space station with a rotating wireframe cube around it.
This would have been shown on British TV at some point between the mid 80s and early 90s, probably at a child-friendly time of day. I don't know if it was a film or an episode of a series, because I probably started watching part way through.
I suppose it's possible that I'm mixing up two shows here, because I don't remember anything that specifically links the girl in the weird environment to the space station, but my memory says they were both in the same programme. It's also possible that the space station was not a space station at all but some other kind of object, since I don't remember seeing any spaceships dock with it or anything.