memory – How many register slots does a ram have?

Watch this video at this point https://youtu.be/FZGugFqdr60?list=PLME-KWdxI8dcaHSzzRsNuOLXtM2Ep_C7a&t=223

Do you see those slots on the right, inside the RAM, that contain instructions? I heard that they can also store values. A one-dimensional array is stored in adjacent slots in the RAM. I would like to know how many of those slots are in a RAM.