. Elementary zoology. Zoology. BRANCH ARTHROPODA; CLASS INSECT A: THE INSECTS 185 which may be called the aorta. There are no other arteries or veins, the blood simply pouring out of the anterior end of the dorsal vessel into the body-cavity. It bathes the body tissues, flowing usually in regular channels without walls. It re-enters the dorsal vessel through paired lateral openings in the chambers. The main or central nervous system consists of a large ganglion, the "brain," situated in the head above the. Fig. 49.—A section through the compound eye (in late pupal stage) of the blow-
. Elementary zoology. Zoology. BRANCH ARTHROPODA; CLASS INSECT A: THE INSECTS 185 which may be called the aorta. There are no other arteries or veins, the blood simply pouring out of the anterior end of the dorsal vessel into the body-cavity. It bathes the body tissues, flowing usually in regular channels without walls. It re-enters the dorsal vessel through paired lateral openings in the chambers. The main or central nervous system consists of a large ganglion, the "brain," situated in the head above the. Fig. 49.—A section through the compound eye (in late pupal stage) of the blow-fly, Calliphora romitoria. In the centre is the brain, with optic lobe, and on the right-hand margin are the many ommatidia in longi- tudinal section. (Photo-micrograph by Geo. O. Mitchell.) oesophagus, which sends nerves to the antennae and eyes, a ganglion in the head below the oesophagus connected with the brain by a short commissure on each side of the oesophagus, and sending nerves to the mouth-parts; and a ventral nerve-chain composed of a pair of longitudinal. 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937. New York : H. Holt and company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
