. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. 40 DIFFERENTIATION OF THE TISSUES The cells composing the tracheal tubes soon die, so that the tube is not long alive after it comes to maturity. The wood fibers may live but one or only a few years, while the tracheids in respect of length of life seem to vary between the tracheal tubes. Fig. 19.—stages in the development of the elements of -the xylem. A, progressive steps in the development of a tracheal tube. 1, row of procambial or cambial cells that are to tak
. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. 40 DIFFERENTIATION OF THE TISSUES The cells composing the tracheal tubes soon die, so that the tube is not long alive after it comes to maturity. The wood fibers may live but one or only a few years, while the tracheids in respect of length of life seem to vary between the tracheal tubes. Fig. 19.—stages in the development of the elements of -the xylem. A, progressive steps in the development of a tracheal tube. 1, row of procambial or cambial cells that are to take part in the formation of a tube; z, the same at a later stage enlarged" in all dimensions; 3, the cells in 2 have grown larger, their cross-walls have been dissolved out, and the wall has become thickened and pitted; 4, the walls in 3 have become more thickened,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Stevens, William Chase, 1861-. Philadelphia, P. Blakiston's Son
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