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Este verbete ainda não foi traduzido para o seu idioma, portanto o original é exibido abaixo.
tracheid
This term describes a specialized cell type found in the xylem of plants, characterized by its tapered ends and thickened walls. It serves as a critical structural and conductive component, primarily in gymnosperms, where it manages the upward movement of water and dissolved nutrients.
In botanical discourse, the term is used to distinguish these primitive conducting cells from the more advanced vessel elements found in angiosperms. Because it refers to a specific biological unit, it is treated as a standard countable noun in scientific literature.
Meanings
Examples
The student looked through the microscope to identify a single tracheid in the pine needle.
Unlike vessel elements, a tracheid is tapered at both ends.
Water moves from one tracheid to another through pits in the cell wall.
I wonder if this specimen has a higher density of tracheids than the other one.
The structural integrity of the tree depends largely on the lignified walls of the tracheid.
Gymnosperms rely on the tracheid for both support and water conduction.
Look at how the tracheid forms a long, narrow tube for nutrient transport.
The evolution of the tracheid allowed plants to grow taller and move inland.