. Elementary anatomy and physiology : for colleges, academies, and other schools . Trachea of "Water-Scorpion, a. Head. b. First Pair of Legs. c. First Segment of Thorax, d. Second Pair of wings, e. Second Pair of Legs. /. Tracheal Trunk. g> One of the Stigmatae. h. Air-Sac. The essential organs are Trachea or air-vessels, which open upon the sides of the body, and freely communicate with one another. Air sacs are found in the front parts of the body 483. What are the essential organs of respiration in insects ? Whereabouts in the ani- mal are the tracheae found ?

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Keywords: ., bookcentury1800, bookd, booksubjectanatomy, booksubjectphysiology