[Q] Finding /proc/ and /sys/ Contents in ROM

Hello,

I want to determine the ROM of a phone I do not have, in particular the pseudo folder /proc and /sys/. Normally I used ADB shell in order to skim through the folders, but since I do not have the phone here now, I thought that I should be able to find these contents somewhere in the ROM. But I checked in several image parts of the ROM (boot.img, ramdisk.img, system.img e.g.), but the /proc/ as well as the /sys/ folder were always empty.

Can somebody help and tell where (or if?) these folders can be found in the ROM?

Greetings