. An introduction to vegetable physiology. Plant physiology. 16 VEGETABLE PHYSIOLOGY In a few cases, as in certain seaweeds, and in the sieve- tubes of the flowering plants, the connecting strands are sufficiently coarse to be visible under a comparatively low power of the microscope, and to need hardly any special preparation (fig. 18). It will no doubt have been noticed that the term ' cell' is somewhat loosely used. A typical cell of a multicellular. Fig. 17,—Continuity of the Protoplasm op CoNTiauotrs Cells of the Endosperm of a Palm Seed (Bentinckia). Highly magnified. (After Gardiner.) a
. An introduction to vegetable physiology. Plant physiology. 16 VEGETABLE PHYSIOLOGY In a few cases, as in certain seaweeds, and in the sieve- tubes of the flowering plants, the connecting strands are sufficiently coarse to be visible under a comparatively low power of the microscope, and to need hardly any special preparation (fig. 18). It will no doubt have been noticed that the term ' cell' is somewhat loosely used. A typical cell of a multicellular. Fig. 17,—Continuity of the Protoplasm op CoNTiauotrs Cells of the Endosperm of a Palm Seed (Bentinckia). Highly magnified. (After Gardiner.) a, contracted protoplasm of a cell; 6, a group of delicate protoplasmic filaments passing through a pit in the cell-wall. Fia. 18.—Semi-diaqkammatic Lon- gitudinal Section of an Old and Stout Portion of Ceramium ru- brum, SHOWING Continuity be- tween THE PROTOPLASMIO CON- TENTS OF THE Axial or Central Cells, u, a, at theie Ends, and laterally with the cortical Cells 6, by Means of Proto- plasmic Threads. (After Hick.) plant consists of three parts—the protoplast, the cell-wall, and the vacuole (fig. 6); of these the first is the most important, being the hving substance. A protoplast which has no cell-wall and contains no vacuole is still called a cell. The term is again often applied to a cavity which contains no protoplast, as in the case of old wood or cork. In such cases a protoplast once occupied the cavity, but it has been removed by death. These cells or cavities are consequently only the skeletons of dead 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 Green, J. Reynolds (Joseph Reynolds), 1848-1914. London, J. & A. Churchill
Size: 2164px × 1155px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondonjachurchill
