Proventricular Valve Insect
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![Untitled Document [bioclass.cos.ncsu.edu]](https://bioclass.cos.ncsu.edu/bio402_315/arthropods/new%20arthropod/tubular-heart.gif "Proventricular Valve Insect")
![Elementary entomology ([c1912]) Elementary entomology ...](https://c8.alamy.com/comp/RWMX91/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-RWMX91.jpg "Proventricular Valve Insect")
00027-0/asset/a13bbff9-1f7a-49d7-bae5-03dc1d80bebd/main.assets/gr2a.jpg "Proventricular Valve Insect")
![Elementary entomology ([c1912]) Elementary entomology ...](https://c8.alamy.com/comp/RWMY93/elementary-entomology-c1912-elementary-entomology-elementaryentomo00sand-year-c1912-anatomy-of-insects-internal-33-extends-the-length-of-the-body-along-the-median-line-just-beneath-the-notum-in-the-abdomen-of-adult-insects-this-tube-is-divided-into-several-chambers-each-of-which-has-a-valve-at-either-side-allowing-the-blood-to-flow-into-it-but-preventing-its-escape-the-chambers-are-also-separated-by-valves-which-allow-the-blood-to-flow-forward-but-prevent-its-backward-passage-the-abdominal-part-of-the-tube-the-heart-proper-pulsates-and-drives-the-blood-toward-the-head-while-t-RWMY93.jpg "Proventricular Valve Insect")
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