Across
- 2. long, slender shape, give rise to the cells of the axial system
- 3. woods that come from gymnosperms
- 7. is the second most abundant naturally occurring polymer after cellulose
- 8. most abundant hemicellulose in hardwood
- 10. combination of cellulose and hemicellulose
- 11. principal hemicelluloses in softwoods
- 13. is the face that is exposed when a tree is cut down (x-section)
- 16. give rise to the radial system.
- 19. conducting cells in hardwoods
Down
- 1. the smallest natural unit of cell wall structure that can be distinguished with an electron microscope.
- 4. longitudinal sections - they extend parallel to the axial system (along the grain)
- 5. a substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together.
- 6. relatively low molecular weight heteropolysaccharide, which occur in plant tissues together with cellulose and functions as supporting material in the cell walls.
- 7. open portion of the cell where the protoplast would have existed
- 9. simple sugars
- 11. latex produced by species belonging to family sapotaceae
- 12. relatively thin wall layer
- 14. source of diterpenoids as component of manila copal
- 15. layer of secondary wall adjacent to the compound middle lamella
- 17. thin areas in the cell walls between two cells, and are a critical aspect of wood structure
- 18. an imprecise term used to collectively describe extractives