. Elementary entomology. Entomology. Fig. 31. Ideal section through an insect a, alimentary canal; h, heart; n, nerve cord ; s, stigmata, or spiracles ; /, tracheal tubes ; /, legs; 7(', wings. (From Riverside Natural Histor)') 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. » _ »» h. Fig. 32. Ideal longitudinal section of an insect, showing relative position of organs a, alimentary canal; //, heart; Jii, muscle bands ; «, nerve cord ; r, reproduct
. Elementary entomology. Entomology. Fig. 31. Ideal section through an insect a, alimentary canal; h, heart; n, nerve cord ; s, stigmata, or spiracles ; /, tracheal tubes ; /, legs; 7(', wings. (From Riverside Natural Histor)') 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. » _ »» h. Fig. 32. Ideal longitudinal section of an insect, showing relative position of organs a, alimentary canal; //, heart; Jii, muscle bands ; «, nerve cord ; r, reproductive organs. (After Comstock) Just beneath the back is a small, transparent tube, the dorsal blood vessel, or heart. Along the median line, close to the ventral wall, is a series of small white knots, or ganglia, connected by a double 28. 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 Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882; Metcalf Collection (North Carolina State University). NCRS. Boston, Ginn
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
