. Flashlights on nature [microform]. Insects; Plants; Insectes; Plantes. British Bloodstxkers 241 the es its organ ncans h the irtling ke the Unimal it is as a locomotive device everybody knows who has once tried a few heaUhy mosquito larviu round the brimming sea of his bedroom basin. The breathing - tube deserves a Httle longer notice. By its means air is conveyed direct into the internal air-channels of the insect, which do not form lungs, but ramify like arteries all over the body. We carry our blood to the lungs to be aerated ; the insects carry the oxygen to the blood. To take
. Flashlights on nature [microform]. Insects; Plants; Insectes; Plantes. British Bloodstxkers 241 the es its organ ncans h the irtling ke the Unimal it is as a locomotive device everybody knows who has once tried a few heaUhy mosquito larviu round the brimming sea of his bedroom basin. The breathing - tube deserves a Httle longer notice. By its means air is conveyed direct into the internal air-channels of the insect, which do not form lungs, but ramify like arteries all over the body. We carry our blood to the lungs to be aerated ; the insects carry the oxygen to the blood. To take in air, the larva fre- m quently rises to near the surface, as you see him doing in No. 4 ; then he stands on his head, cocks up his tail, and pushes out his air-tube. Indeed, when at rest this is his usual attitude. No. 5, which, of course, is very highly magnified, shows his tail in the act of taking in a good gulp of oxygen. The little valves, or doors, which cover the air-tube are here opened radially, and the larva is breathing. To the right you see the position of the tube after he has taken in a long Q. NO. 5.—THE larva's BREATHING-TUUF, CLOSED AND OI'EN. i; \V. 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 Allen, Grant, 1848-1899. London : G. Newnes
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectin, booksubjectplants
