Just found this good paper from medical research with diagrams of the anal canal:
https://kb.osu.edu/dspace/bitstream/han ... sequence=1
The size is TINY of the area no wonder the dinky little anal glands are a problem. I am wondering if anal glands can be safely removed to avoid future problems? These seem to be the root cause of abscess and fistula problems because when they get clogged up they explode and cause the suffering. Just curious.