. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. 74 THE VITAL FUNCTIONS. a general ditfusion, or circulation of nourishment through numerous channels of communication, into. which certain absorbing vessels convey it from a great number of external orifices, or mouths, as they may be called. This is the case with the Taniia, or tape worm, which is composed of a series of flat jointed portions, of which two contiguous segments are seen, highly magnified, in Fig. 247, exhibiting round the margin of each porti
. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. 74 THE VITAL FUNCTIONS. a general ditfusion, or circulation of nourishment through numerous channels of communication, into. which certain absorbing vessels convey it from a great number of external orifices, or mouths, as they may be called. This is the case with the Taniia, or tape worm, which is composed of a series of flat jointed portions, of which two contiguous segments are seen, highly magnified, in Fig. 247, exhibiting round the margin of each portion, a circle of vessels (v), which communicate with those of the adjoining segments; each circle being provided with a tube (o), having external oT[)enings for im- bibing nourishment from the surrounding fluids. Although each segment is thus provided with a nutritive apparatus complete within itself, and so far, therefore, independent of the rest, the indi- viduality of the whole animal is sufficiently deter- mined by its having a distinct head at one extre- mity, provided with instruments for its attachment to the surfaces it inhabits. The Hydatid (Fig. 248) is another parasitic worm of the simplest possible construction. It has a head (o), (of which H is a magnified representation,) furnished with four suckers, and a tubular neck,. 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 Roget, Peter Mark, 1779-1869. London : W. Pickering
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