Could balneology section be actually gastric section?

[Koen G]

I thought that "everyone" agreed that many of the "pipes and tubs" in this section are barely disguised organs of the human body. 

This could be argued for two or three instances, but it would require a lot of theorizing to spread this over the entire section, or even to more than a few folios. Q13 is very diverse and hard to view through a single lens. There is probably a reason why people couldn't agree on what to call Q13: biological or balneological. 

I think it's safe to say that, just like the rest of the MS, it is inspired by a range of works/traditions that can be broadly described as medical/medicinal. But just like the rest of the MS, it does something weird with these sources. And even within the strictly therapeutic framework, expecting the whole quire to refer to the human body ignores the striking similarities with balneological imagery (Balneis).