Photography via Pexels (free licence)

operatory: photographer on photo page — https://www.pexels.com/photo/35438269/
unit: photographer on photo page — https://www.pexels.com/photo/305567/

avatar (round profile photo, doctor card): AI-generated image (Runway, text-to-image) of a fictional person, created for this concept.
It depicts no real individual; "Dr. Jonah Revell" does not exist. The page labels it as AI-generated.