. British fresh-water fishes. Fishes. THE BREATHING APPARATUS, ETC., OF FISH 23. Fig. II. Bones of Head of the Perch. {After Giinther.) then divides into fine capillaries, in which the blood is oxygenated and returns purified into the circulatory system. The water, having supplied the gills with oxygen, passes out through the gill-cover, which, in most Teleosteous fish^ takes the form of a slit, marking the division between the head and the trunk. It is protected by a thin, bony, external plate, called the oper- culum (Figs. I. and II., 28), which with other bones, termed, from their posi- tio
. British fresh-water fishes. Fishes. THE BREATHING APPARATUS, ETC., OF FISH 23. Fig. II. Bones of Head of the Perch. {After Giinther.) then divides into fine capillaries, in which the blood is oxygenated and returns purified into the circulatory system. The water, having supplied the gills with oxygen, passes out through the gill-cover, which, in most Teleosteous fish^ takes the form of a slit, marking the division between the head and the trunk. It is protected by a thin, bony, external plate, called the oper- culum (Figs. I. and II., 28), which with other bones, termed, from their posi- tion relative to it, the pra;oper- culum {Ibid., 30), the suboperculum [Ibid., 32), and the interoperculum {Ibid., 23)^ form the gill-cover. Now the gills are very delicate organs ; a fish which may recover from frightful external injuries Fig. hi. , "' „ „ succumbs to a Bones of Part of Head of the Perch. (After Gimther.) Comparatively. 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 Maxwell, Herbert, Sir. London, Hutchinson & Co.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectfishes
