pith
soft, spongy tissue in the center of stems of certain plants
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
pith
The core of the central vascular cylinder of monocot roots, consisting of parenchyma cells, which are ringed by vascular tissue; ground tissue interior to vascular bundles in dicot stems.
pituitary gland ...
pith
The core of a dicotyledon stem, containing parenchyma cells that have a storage function.
pith -- To severely damage the brain of a frog, also any central region of parenchyma tissue within a plant stem.
pith ray The region or tissue located between vascular bundles in a stem and connecting the pith and cortex; also termed interfascicular region or medullary ray.
pith Parenchymal tissue in the center of a stem located interior to the vascular bundles.
bark
wood
pith
Bark
Cork. The outer part of the bark is protected by layers of dead cork cells impregnated with suberin. Suberin is waxy and cuts down water loss from the stem.
In the very center is a pith, surrounded by primary xylem and a small fringe of secondary xylem [wood, MJF]. Then there is black gunk and an open white area.
There is no pith region in monocots. Dicot stems have bundles in a ring surrounding parenchyma cells in a pith region. Between the bundles and the epidermis are smaller (as compared to the pith) parenchyma cells making up the cortex region.
It forms, for example, the cortex and pith of stems, the cortex of roots, the mesophyll of leaves, the pulp of fruits, and the endosperm of seeds.
7. To ascend on a musical scale; to take a higher pith; as, to rise a tone or semitone.
8. To be lifted, or to admit of being lifted, from the imposing stone without dropping any of the type; said of a form.
Medulla the farther‚ smaller bulge between the pons and the top of the spinal cord
(medull = marrow‚ pith)
Meiosis a special cell division resulting in sex cells with half as many chromosomes
(meio = less; -sis = the act of) ...
 See also: Tissue, Plant, Cells, Xylem, Trans
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