. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 102 ECONOMIC ZOOLOGY AND ENTOMOLOGY no special organs of respiration, but the thin walls of the skin are traversed by a network of minute blood-vessels which are separated from the air by only a very thin membrane through which the oxygen passes readily and the carbon dioxide is given off. nepkridium don&l blodd vessel hepatic cells /' ,' longitudinal muscle /i ^circular muscle fibres r epidermis .cuticle. typhlosole •setae ; .' i nerve cord nephridipore , nephrostome ventral vessel t I body cavity FIG. 38.—

- Image ID: RCY6FF
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 102 ECONOMIC ZOOLOGY AND ENTOMOLOGY no special organs of respiration, but the thin walls of the skin are traversed by a network of minute blood-vessels which are separated from the air by only a very thin membrane through which the oxygen passes readily and the carbon dioxide is given off. nepkridium don&l blodd vessel  hepatic cells /' ,' longitudinal muscle /i ^circular muscle fibres r epidermis .cuticle. typhlosole •setae ; .' i nerve cord nephridipore , nephrostome ventral vessel t I body cavity FIG. 38.— Stock Photo
Enlarge
https://www.alamy.com/licenses-and-pricing/?v=1 https://www.alamy.com/elementary-textbook-of-economic-zoology-and-entomology-zoology-insect-pests-102-economic-zoology-and-entomology-no-special-organs-of-respiration-but-the-thin-walls-of-the-skin-are-traversed-by-a-network-of-minute-blood-vessels-which-are-separated-from-the-air-by-only-a-very-thin-membrane-through-which-the-oxygen-passes-readily-and-the-carbon-dioxide-is-given-off-nepkridium-donampl-blodd-vessel-hepatic-cells-longitudinal-muscle-i-circular-muscle-fibres-r-epidermis-cuticle-typhlosole-setae-i-nerve-cord-nephridipore-nephrostome-ventral-vessel-t-i-body-cavity-fig-38-image231708499.html
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 102 ECONOMIC ZOOLOGY AND ENTOMOLOGY no special organs of respiration, but the thin walls of the skin are traversed by a network of minute blood-vessels which are separated from the air by only a very thin membrane through which the oxygen passes readily and the carbon dioxide is given off. nepkridium don&l blodd vessel hepatic cells /' ,' longitudinal muscle /i ^circular muscle fibres r epidermis .cuticle. typhlosole •setae ; .' i nerve cord nephridipore , nephrostome ventral vessel t I body cavity FIG. 38.—
Paul Fearn / Alamy Stock Photo
Image ID: RCY6FF
This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 102 ECONOMIC ZOOLOGY AND ENTOMOLOGY no special organs of respiration, but the thin walls of the skin are traversed by a network of minute blood-vessels which are separated from the air by only a very thin membrane through which the oxygen passes readily and the carbon dioxide is given off. nepkridium don&l blodd vessel \ hepatic cells /' ,' longitudinal muscle /i ^circular muscle fibres r epidermis .cuticle. typhlosole •setae ; .' i nerve cord nephridipore , nephrostome ventral vessel t I body cavity FIG. 38.—Cross-section of earthworm. The earthworm is hermaphroditic, that is, both spermatozoa and ova are produced in the same individual. The testes are two pairs of flattened glands lying in the region of the tenth and eleventh segments. These are connected with the seminal •vesicles and communicate with the exterior through the long vasa deferentia which open in the fifteenth segment. The ovaries are attached to the septa separating the twelfth and thirteenth segments. The ova reach the exterior through a pair of funnel- shaped oviducts, the mouths of which are near the ovaries.. 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 work.. Kellogg, Vernon L. (Vernon Lyman), 1867-1937; Doane, Rennie Wilbur, 1871-. New York, H. Holt and company

Search stock photos by tags


Similar stock images