More a biology lesson. It’s the scientific word for the appendage. Human’s — I believe all mammals as well — have them lining our lower intestines. They help us absorb nutrients by increasing surface area.
The word itself, papillae, just means “a small, rounded part which protrudes from an organ/ nipple” from Latin.
I couldn’t process the damn sentence and had to read it 3 times before I realized it was the 2nd you that was throwing me off.
So does that count as noticing it?