Zoology; a Text-Book for Universities, Colleges And Normal Schools
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In our eReader you can find the full English version of the book. Read Zoology; a Text-Book for Universities, Colleges And Normal Schools Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Zoology; a Text-Book for Universities, Colleges And Normal Schools
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228 ZOOLOGY in animals is a most interesting phenomenon to zoologists. This group is the first in which we have found true metamerism. The body of the animals is more or less constricted on the outside into rings — as the name (Annelida) implies. The internal organs also show metamerism, but in various ways. These organs may pass directly through, with slight segmental modification, as the digestive tube and ventral nerve cord; they may be repeated independently in each segment, as the setas or... nephridial tubules ; or they may be represented in only one or a limited number of n. c.
d n. f.
Fig. 102. Longitudinal section of anterior end of Dero, A, sagittal section; B, frontal section to show anterior portion of nervous system, b, brain; co., nervous collar about the mouth; c.v., contractile blood vessels ("hearts"); d, dissepiment; d.m., dermo-muscular wall; d.v., dorsal blood vessel; m, mouth; n.c, nerve cells; r./., nerve fibres; np., nephridia; p, prostomium; ph., pharynx; s, sets; sn„ segmental nerves; v.g.
What to read after Zoology; a Text-Book for Universities, Colleges And Normal Schools?
You can find similar books in the "Read Also" column, or choose other free books by Thomas Walton Galloway to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
228 ZOOLOGY in animals is a most interesting phenomenon to zoologists. This group is the first in which we have found true metamerism. The body of the animals is more or less constricted on the outside into rings — as the name (Annelida) implies. The internal organs also show metamerism, but in various ways. These organs may pass directly through, with slight segmental modification, as the digestive tube and ventral nerve cord; they may be repeated independently in each segment, as the setas or... nephridial tubules ; or they may be represented in only one or a limited number of n. c.
d n. f.
Fig. 102. Longitudinal section of anterior end of Dero, A, sagittal section; B, frontal section to show anterior portion of nervous system, b, brain; co., nervous collar about the mouth; c.v., contractile blood vessels ("hearts"); d, dissepiment; d.m., dermo-muscular wall; d.v., dorsal blood vessel; m, mouth; n.c, nerve cells; r./., nerve fibres; np., nephridia; p, prostomium; ph., pharynx; s, sets; sn„ segmental nerves; v.g.
What to read after Zoology; a Text-Book for Universities, Colleges And Normal Schools?
You can find similar books in the "Read Also" column, or choose other free books by Thomas Walton Galloway to read onlineMoreLess
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