I commented this elsewhere but please take a look at a few minutes of this video. Just because we do not understand the mechanism does not mean that it doesn't exist.
A renowned biologist Michael Levin took some basic skin cells from a frog embryo and separated them from the rest of the organism. Astonishingly these “skin” cells rebooted themselves and converted into a new type of organism that is able to solve simple mazes, and demonstrate individual and group behaviors.
I am purely panpsychist. My intuition says that literally everything in this universe has a bit of consciousness in it. An atom has a bit, a cell has a few bits, a human brain has trillions of bits.
As an analogy, in a vivid dream "you" may be holding an apple, but in the end both you and that apple are made of dream-stuff. I believe that is the case for reality as well.