Archive image from page 60 of The anatomy, physiology, morphology and. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author; CUbiodiversity4765349-9885 Year: 1890 ( THE RESPIRATORY ORGANS. 4. THE RESPIRATORY ORGANS. The trachese of the larva consist of two main longitudinal trunks (Fig. lo), which give off numerous lateral branches. These divide and subdivide, and their terminal divisions form a dense network
Archive image from page 60 of The anatomy, physiology, morphology and. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author; CUbiodiversity4765349-9885 Year: 1890 ( THE RESPIRATORY ORGANS. 4. THE RESPIRATORY ORGANS. The trachese of the larva consist of two main longitudinal trunks (Fig. lo), which give off numerous lateral branches. These divide and subdivide, and their terminal divisions form a dense network of exceedingly fine tubes, tracheal capillaries, in the peritoneal investment of the various internal organs. KiG. II.—Details of the tracheal system of the adult larva. I, a stction through the posterior spiracle, :J-iiu:h objective ; 2, a section through one of the stigmatic slits ( -[V oil immersion); 3, section through the .interior spiracle (.V oil immer- sion) ; 4, a portion of a tracheal trunk, ol>jective ; 5, tracheal terminations, peritraciieal cells (peritoneal coat); tr, trachea ; v, vestibule ; s, slits ; h, nuclei of peritracheal cells ; e, mesoblast cells ; pr, fibres of the vestibule,?-, grating of the slits ; ul, imaginal disc of the anterior spiracle (upper prothoracic disc). Leydig correctly maintained that these capillaries are de- veloped in the interior of the cells of the connective tissue, but Wistinghausenf has quite recently described them as between Leydig, Fr.,' Zum Feineren Baudes Arthropoden.' Miiller's Archiv., 1855. t Wistinghausen, ' Ober Tracheenendigungen in den Sericterien der Raupen.' Zeitsch. f. \v. Zool., Bd. 49, p. 565.
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