A tracheid is a long and tapered lignified cell in the xylem of vascular plants. It is a type of conductive cell called a tracheary element. Angiosperms also use another type of conductive cell, called vessel elements, to transport water through the xylem.

tracheid, in botany, primitive element of xylem (fluid-conducting tissues), consisting of a single elongated cell with pointed ends and a secondary, cellulosic wall thickened with lignin (a chemical binding substance) containing numerous pits but having no perforations in the primary cell wall.

2025年1月30日 · Tracheids are a type of water-conducting cell found in the xylem of vascular plants. They are long, thin cells that help transport water and minerals from roots to leaves. …

2021年6月28日 · Tracheids are one of the two types of tracheary elements of vascular plants. (The other being the vessel elements). A tracheid cell loses its protoplast at maturity. Thus, at …

2023年6月2日 · Difference Between Tracheids And Vessels: Tracheids and vessels are specialized cells involved in water conduction within plants. Tracheids are elongated cells with thick walls, while vessels are tube-like structures formed by fused cells.

The meaning of TRACHEID is a long tubular pitted cell that is peculiar to xylem, functions in conduction and support, and has tapering closed ends and thickened lignified walls.

2019年10月21日 · Tracheids are tubular cells in the xylem of vascular plants, involved in the conduction of water from the roots to the leaves. Tracheids are present in all vascular plants (Pteridophytes, and Gymnosperms). They (tracheids) consist of less number of large pits. Tracheids are not efficient in water conduction because their walls are not perforated.

Because tracheids have a much larger surface area to volume ratio compared to vessel elements, they hold water against gravity (by adhesion) when transpiration is not occurring. This mechanism helps plants prevent air embolisms. The term "tracheid" was introduced by Carl Sanio in 1863, originally as Tracheide, in German. [4]

The tracheid is the basic cell in the xylem, that is, all plants have tracheids, but not the more highly evolved vessel elements. Tracheids are generally spindle shaped, very elongate, and have tapered ends.

2018年5月29日 · *tracheid* A type of cell occurring within the xylem [1] of conifers, ferns, and related plants. Tracheids are elongated and their walls are usually extensively thickened by deposits of lignin. Water flows from one tracheid to another through unthickened regions (pits) in …