File:Animal and vegetable physiology, considered with reference to natural theology, by Peter Mark Roget (1834) (14592190740).jpg

Identifier: animalandvegetab01roge (find matches)
Title: Animal and vegetable physiology, considered with reference to natural theology, by Peter Mark Roget ..
Year: 1834 (1830s)
Authors: Roget, Peter Mark, 1779-1869
Subjects: Biology Physiology Plant physiology Natural theology
Publisher: London : W. Pickering
Contributing Library: University of California Libraries
Digitizing Sponsor: MSN

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In some species the horny base is fashionedinto a number of cells, each of which serves forthe protection of its respective polype. Thesecells are generally placed at the extremity ofthe branches, presenting the greatest similitudeto flowers. The Flustra (Fig. 63) is composedof minute and almost microscopic cells, spreadover a flat membraneous substance, resembling,in the flexibility of its texture, and its mode ofsubdivision, the leaves of plants. These cells arearranged in rows, with great regularity, like those 166 THE MECHANICAL FUNCTIONS. of a honey-comb, as is seen in the magnifiedview of them, Fig. 64. In other tribes the inorganic base of supportis internal, constituting a kind of skeleton oraxis; the polypous mouths being spread at in-tervals over the surface of the fleshy layer whichcovers this skeleton. This is the case with theGoiooiiia, Atitipathes, and the Coral, which ex-hibit still closer resemblances to the branchedforms of vegetable stems. The flesh containsgranules

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