melvil [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons
These are a person’s vocal cords. If you want to see what “normal” vocal cords look like in action, watch the short video below. The person whose vocal cords are shown working is a professionally trained singer.
The previous video did not include the sounds the person was making, just a video of the movements. The next video includes sounds at different pitches and different words and shows how the vocal cords work to make those sounds.