What is the purpose and composition of wood?

Wood has many uses, and I will list its uses as (40):

1.2 bed. Table 3. Fourth floor. Tea set 5. Washboard 6. Kitchen utensils 7. The eighth chair. Cup 9. Globe 10. Pencil 1 1. Baseball bat 12. Tumbler 13. Bookcase 65438. 7. ashtray 18. Photo frame 19. Book cover 20. Trash bin 2 1. Fence 22. Room 23. Block 24. Sweep rod 25. Window frame 26. Buddha statue 27. Wood blade 28. Hang clothes 29. Wooden handicrafts. Sedan chair 3 1 Composition: cellulose. What needs to be added is that cellulose is a kind of polysaccharide, which belongs to sugar and consists of three elements: C, H and O.