Question

some small or short points on trachieds?​

Answer 1

1. Tracheids are elongated cells in the xylem of vascular plants that serve in the transport of water and mineral salts.
2. Tracheids are one of two types of tracheary elements, vessel elements being the other.
3. Tracheids, unlike vessel elements, do not have perforation plates.
4. All tracheary elements develop a thick lignified cell wall, and at maturity the protoplast has broken down and disappeared.
5. The presence of tracheary elements is the defining characteristic of vascular plants to differentiate them from non-vascular plants.
6. The two major functions that tracheids may fulfill are contributing to the transport system and providing structural support.