Text-book of comparative anatomy . ginations. C. A second unpaired section is sometimes added to the unpairedterminal portion described under B; this section arises by the fusingof the two sperm ducts or oviducts throughout tracts of varying lengthto form one unpaired duct (ductus ejaculatorius, uterus, vagina, etc.),this unpaired duct enters the ectodermal invagination. This isprobably the case in all the so-called higher insects (insects with com-plete metamorphosis). The position of the outer genital apertures is very various. In the Chilopoda among the Myriapoda the unpaired genital apertu
Text-book of comparative anatomy . ginations. C. A second unpaired section is sometimes added to the unpairedterminal portion described under B; this section arises by the fusingof the two sperm ducts or oviducts throughout tracts of varying lengthto form one unpaired duct (ductus ejaculatorius, uterus, vagina, etc.),this unpaired duct enters the ectodermal invagination. This isprobably the case in all the so-called higher insects (insects with com-plete metamorphosis). The position of the outer genital apertures is very various. In the Chilopoda among the Myriapoda the unpaired genital aperturelies in the penultimate body segment, in the genital segment, whoselimbs may be transformed into genital appendages. 486 COMPARATIVE ANATOMY CHAP. In the Diplopoda and Pauropoda the two genital apertures lie behindthe 2cl pair of legs, generally at the boundary between the 2d and 3dtrunk segments. In the Sym-phyla (Scolopendrella) the unpaired genital aperture lieson the 4th trunk segment between the legs of this segment. A.
Size: 1040px × 2404px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
