Answer:
I'm not so sure what the answer is but it may have to do with the movie "La Forma del Agua"
Explanation:
This might be helpful
https://www.bbc.com/mundo/noticias-42741116
that would be the kidneys
You can tell it--> Estoy acostado or Yo estoy acostado,
but the correct is Estoy acostado.
Trabaja -Hope this helps!