Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] CHAPTER IV ANATOMY OF INSECTS — INTERNAL The general arrangement of the internal organs of an insect may be understood by a study of transverse and longitudinal sec- tions, as shown in Figs. 31 and 32. Attached to the inside of FIG. 31. Ideal section through an insect a, alimentary canal; 7z, heart; ;?, nerve cord ; s, stigmata, or spiracles ; t, tracheal tubes ; /, legs; 7f, wings. (From Riverside Natural History) the body wall are found layers of longitudinal and vertical mus- cles which control th
Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] CHAPTER IV ANATOMY OF INSECTS — INTERNAL The general arrangement of the internal organs of an insect may be understood by a study of transverse and longitudinal sec- tions, as shown in Figs. 31 and 32. Attached to the inside of FIG. 31. Ideal section through an insect a, alimentary canal; 7z, heart; ;?, nerve cord ; s, stigmata, or spiracles ; t, tracheal tubes ; /, legs; 7f, wings. (From Riverside Natural History) the body wall are found layers of longitudinal and vertical mus- cles which control the body movements. Through the center of the body runs a large tube, the alimentary canal, or digestive tract.
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