Stem Anatomy

4. Function as companion cells
5. Consists of the Xylem and Phloem
8. First formed primary phloem that consists of narrow sieve tube
9. Forms major component in a young plant
11. Transports food materials from leaves to other parts of the plant
12. These are dead without protoplasm
14. A group of cells having a common origin and functions
15. Lacks sieve tubes and companion cells. Instead, they have albuminous cells and sieve cells
18. Made of only one type of cells
19. Single layered, made of elongated, compactly arranged parenchymatous cells
20. Absent in roots and prevents the loss of water
21. Present in fibres and sclereids
22. Also known as bast fibres
23. Conducting tissue for water and minerals from roots to stem and leaves

1. elongated and pointed cells grouped together to form strands
2. Provides mechanical support that allows easy bending in various parts of plants without breaking
3. Small and rounded areas where no secondary wall material has been deposited
6. Constitute permanent tissues
7. Following cell division, newly formed cells become structurally and functionally specialized and lose their ability to divide
10. Helps in maintaining pressure gradient in the sieve tubes
13. Causes the gritty texture in pears
16. Growth in plants that is restricted to specialized regions of active cell division
17. Later formed phloem that has bigger sieve tubes