. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. 398 PHYSIOLOGY AND MORPHOLOGY OF ANIMALS. all invertebrates there are blood-sinuses or reservoirs in various parts of the body, into which the blood is discharged, and from which it is again taken up. (3) In vertebrates the oxidized blood is bright red and the deoxidized blood dark purple-red, and this, therefore, is the conven- tional mode of repre- senting these two kinds of blood in colored dia- gram. In default of col- or we have used unshad- ed and shaded spaces to represent
. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. 398 PHYSIOLOGY AND MORPHOLOGY OF ANIMALS. all invertebrates there are blood-sinuses or reservoirs in various parts of the body, into which the blood is discharged, and from which it is again taken up. (3) In vertebrates the oxidized blood is bright red and the deoxidized blood dark purple-red, and this, therefore, is the conven- tional mode of repre- senting these two kinds of blood in colored dia- gram. In default of col- or we have used unshad- ed and shaded spaces to represent the same. We continue to use the same purely conventionally, although in the case of invertebrates there is no such marked change in color or shade. (4) The diversity among invertebrates is so extreme that it is im- possible to do more than select a few striking ex- amples from each de- partment. (5) In this selection we pass over insects for the present to come back to them. The reason is the same which induced us to do so in giving the com- parative morphology of the eye (page 162)—viz., that in respiration and circulation insects are entirely peculiar, and are outside of the direct line of evolution, or of increasing complication as we go Fig. 276.—Lobster with the carapace taken off: st, stomach ; dotted tube, ii, intestines; L, liver; H, heart; G} gills ; GG, green 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 LeConte, Joseph, 1823-1901. New York, D. Appleton and Company
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