tracheid

views updated Jun 27 2018

tracheid One of the long, cylindrical, tapered cells in a trachea. The cell is dead and the wall has bands of lignin in it which add structural strength. Its function is to form part of the trachea and so to conduct xylem fluids.

tracheid

views updated May 29 2018

tracheid A type of cell occurring within the xylem 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 the cell walls. Compare vessel element.