A Course in Invertebrate Zoölogy; a Guide to the Dissection And Comparative Study of Invertebrate Animals
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In our eReader you can find the full English version of the book. Read A Course in Invertebrate Zoölogy; a Guide to the Dissection And Comparative Study of Invertebrate Animals 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 A Course in Invertebrate Zoölogy; a Guide to the Dissection And Comparative Study of Invertebrate Animals
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To quickly assess the difficulty of the text, read a short excerpt:
Draw a single hook highly magnified.
The proglottids. Each proglottid is composed mainly of repro- ductive organs and circular, longitudinal, and oblique muscle fibers imbedded in a spongy tissue called parenchyma. The parenchyma fills the entire primitive body-cavity, which is thus absent in this animal. Each proglottid contains a complete set of both male and female genital organs. These are immature in the youngest and smallest proglottids ; in those at about a third of the distance from the... anterior end of the body they are mature ; in the largest proglottids, those at the posterior 82 INVERTEBRATE ZOOLOGY end of the body, the uterus is so distended with eggs that most of the other genital organs are obhterated and do not appear.
A pair of longitudinal excretory canals passes from one end of the worm to the other, running near to and parallel with each lateral edge ; in each proglottid, also, are one or two transverse canals.
One or more pairs of longitudinal nerves run parallel with and very near the excretory canals, which are also joined in each proglottid by a ring commissure.
What to read after A Course in Invertebrate Zoölogy; a Guide to the Dissection And Comparative Study of Invertebrate Animals?
You can find similar books in the "Read Also" column, or choose other free books by Henry Sherring Pratt to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Draw a single hook highly magnified.
The proglottids. Each proglottid is composed mainly of repro- ductive organs and circular, longitudinal, and oblique muscle fibers imbedded in a spongy tissue called parenchyma. The parenchyma fills the entire primitive body-cavity, which is thus absent in this animal. Each proglottid contains a complete set of both male and female genital organs. These are immature in the youngest and smallest proglottids ; in those at about a third of the distance from the... anterior end of the body they are mature ; in the largest proglottids, those at the posterior 82 INVERTEBRATE ZOOLOGY end of the body, the uterus is so distended with eggs that most of the other genital organs are obhterated and do not appear.
A pair of longitudinal excretory canals passes from one end of the worm to the other, running near to and parallel with each lateral edge ; in each proglottid, also, are one or two transverse canals.
One or more pairs of longitudinal nerves run parallel with and very near the excretory canals, which are also joined in each proglottid by a ring commissure.
What to read after A Course in Invertebrate Zoölogy; a Guide to the Dissection And Comparative Study of Invertebrate Animals?
You can find similar books in the "Read Also" column, or choose other free books by Henry Sherring Pratt to read onlineMoreLess
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