my aisle of the produce section

[VicNicSor]

Mulder asks a nurse in a hospital about a patient:
- Do you know who was taking care of Peggy O'Dell last night?
- Not me, it's not my ward. Not my aisle of the produce section.
The X-Files, TV series

I understand it means something like "it's outside of my responsibility". But why are words chosen like "aisle", "produce section"... is it a metaphore? Especially, what does "produce section" mean?
Thank you.

 

[vendoubt]

Supermarket vocabulary
Produce section has farm-produced foods, like fruits and vegetables.

 

[Barque]

It's not an expression I've heard before. But "produce" can mean vegetables and fruits. The term "produce section" refers to the section in a store or supermarket where you can find fresh fruits and vegetables. There could be several aisles in this section, and I suppose each could have an attendant/a supervisor.

The nurse's saying she's not in charge of the ward where Peggy O'Dell is, comparing the ward to a supermarket aisle.

Another possible reason - a "vegetable" is someone who has a severe handicap and whose movements are severely restricted. She might be using the term "produce" to refer to the ward where such patients are. Derogatorily.

 

[VicNicSor]

Yes, she was really joking.

Thanks for the answers!