. Animal physiology. Physiology, Comparative; Physiology, Comparative. ATMOSPHERIC RESPIRATION. 251 cannot be distinguished; but the motion of the water may be readily perceived in a tolerable microscope, especially when small light particles, such as powdered charcoal, are diffused through it. 320. In animals whose blood is made to act directly upon Head. Tracheae Stigmata Air-sacs Fig. 151.—Respiratory Apparatus of Insect (Nepa). the air, we usually find a provision of some kind for introducing the air into the interior of the body. The simplest arrangement is that which we meet with in the
. Animal physiology. Physiology, Comparative; Physiology, Comparative. ATMOSPHERIC RESPIRATION. 251 cannot be distinguished; but the motion of the water may be readily perceived in a tolerable microscope, especially when small light particles, such as powdered charcoal, are diffused through it. 320. In animals whose blood is made to act directly upon Head. Tracheae Stigmata Air-sacs Fig. 151.—Respiratory Apparatus of Insect (Nepa). the air, we usually find a provision of some kind for introducing the air into the interior of the body. The simplest arrangement is that which we meet with in the Snail and Slug; and it con- sists merely of a cavity, resembling that in which the gills are. 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 Carpenter, William Benjamin, 1813-1885. London : Wm. S. Orr and Co.
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