The principles of biology . e into a closely-fittingcase for the spiral cells. Fig. 4. Represents a m uch more massive absorbent from the sameleaf, the surrounding tissues being omitted. Fig. 5. Similarly represents, vrithout its sheath, an absorbent fromthe leaf of Chisia Jlava. Fig. 6. End view of an absorbent organ from the root of aTurnip. It is taken from the outermost layer of vessels. Its funnel-shaped interior is dravra as it presents itself when looked at from theoutside of this layer, its narrow end being directed towards thecentre of the Turnip. Fig. 7 A longitudinal section through
The principles of biology . e into a closely-fittingcase for the spiral cells. Fig. 4. Represents a m uch more massive absorbent from the sameleaf, the surrounding tissues being omitted. Fig. 5. Similarly represents, vrithout its sheath, an absorbent fromthe leaf of Chisia Jlava. Fig. 6. End view of an absorbent organ from the root of aTurnip. It is taken from the outermost layer of vessels. Its funnel-shaped interior is dravra as it presents itself when looked at from theoutside of this layer, its narrow end being directed towards thecentre of the Turnip. Fig. 7 A longitudinal section through the axis of another suchorgan, showing its annuli of reticulated cells when cut through. Thecellular tissue which fills the interior is supposed to be removed. 566 Fig. 8. A less-developed absorbent, showing its approximate con-nexion with a duct. In their simplest forms, these structures consistof only two fenestrated cells, with their ends bent round so as tomeet. Such types occur in the central mass of the Turnip, where. the vascular system is relatively imperfect. Besides the compara-tively regular forms of these absorbents, there are forms composedof amorphous masses of fenestrated cells. It should be added thatboth the regular and irregular kinds are very variable in their num-bers : in some turnips they are abundant, and in others scarcely to befound. Possibly their presence depends on the age of the Turnip. ;^^-
Size: 1400px × 1784px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, booksubjectbiology, bookyear1864
