Plant cell has a cellulose layer surrounding the cell membrane called the cell wall. Cellulose makes up about 40% of the dry mass of the wood.
To make paper, wood is processed into pulp either by grinding, heat-treating, or chemically digesting. During the process, wood is broken down to cellulose fibers. Pulp is then spread out and let dry. The fiber forms a network during the process. This network is what we call paper.
The cells are destroyed in the process of making paper and will not be found in paper.