. Elements of plant anatomy;. Botany -- Anatomy. ANATOMY OF THE CELL. 19 about this opening as to form another channel simihir to that of the simple pore. Thus there are two distinct parts to the opening, called the court and canal. The court is also called the limb or border, hence the name bordered pore. As in the simple pore, this structure has an exact counter- part, opposite it, in the adjacent cell, and the two together make up the complete pore which belongs equally to both cells. The thin portion of membrane between the two parts is called, in German, SchUesshaut, or closing membrane.
. Elements of plant anatomy;. Botany -- Anatomy. ANATOMY OF THE CELL. 19 about this opening as to form another channel simihir to that of the simple pore. Thus there are two distinct parts to the opening, called the court and canal. The court is also called the limb or border, hence the name bordered pore. As in the simple pore, this structure has an exact counter- part, opposite it, in the adjacent cell, and the two together make up the complete pore which belongs equally to both cells. The thin portion of membrane between the two parts is called, in German, SchUesshaut, or closing membrane. This name comes from its supposed function in cases of large and well developed pores like those of pine wood. Here its central portion is slightly thickened, a narrow border around this re- maining thin and flexible. If water be pressed into cells containing these pores it passes through the opening', presses ag-ainst ^â¢^'"^ered pores as seen â ^ ^ X o X o Qjj edges of wall and on surface, a pore with slit-formed canal and strongly thickened clos- ing disk, b pore with cylindrical canal; the closing disk here rests on the wall of the court, c pore with oval canal; the disk has grown fast to the wall. {Th. Hartig.). Fig. 13. the Schliesshaut or disk, the flexible portion of which yields, so that the whole membrane is pressed back against the aperture of the opposite part of the pore, the thickened portion lying over the opening. In this way the capacity of one cell is increased at the expense of the others. 2. Chemical and Physical Properties of Wall. The wall consists of solid matter and water. If the latter be driven away by evaporation the remainder is found to con- sist of two sets of substances, organic and inorganic. This is found by burning the dried wall, whereupon the organic matter passes away in the atmosphere, while the inorganic remains. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabili
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotanya, bookyear1895
