Zoology An Elementary Text book
Zoology An Elementary Text book
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In our eReader you can find the full English version of the book. Read Zoology An Elementary Text book 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 An Elementary Text book
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N, in, iv, v, va, vna, ix, x. Foramina for cranial nerves.
a muscular connection with the skull and are termed the branchial arches, since to their sides are attached the gills. The branchial arches are jointed into several pieces, which are placed in an oblique position and so arranged that when they are raised by the levatores arcuum muscles attaching them to the skull they diverge and expand the gill-sacs lying between them. The segments of each branchial arch are typically four in number, n...amed respectively pharyngobranchial, epibranchial, ceratobranchial, and hypobranchial. The first-named are situated in the dorsal wall 458 ELASMOBRANCHII [CH.
of the pharynx and are horizontal in direction ; the epi- and cerato- branchial stiffen the sides of the pharynx the ceratobranchial being the main portion of the arch, whilst the hypobranchial pieces are found in the ventral wall of the pharynx and converge to imite in a median plate, the basibranchial. To the ceratobranchials are attached a number of thin rods of cartilage which run outwards in the wall of the gill-sac and are called gill-rays.
What to read after Zoology An Elementary Text book?
You can find similar books in the "Read Also" column, or choose other free books by A E Arthur Everett Shipley to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
N, in, iv, v, va, vna, ix, x. Foramina for cranial nerves.
a muscular connection with the skull and are termed the branchial arches, since to their sides are attached the gills. The branchial arches are jointed into several pieces, which are placed in an oblique position and so arranged that when they are raised by the levatores arcuum muscles attaching them to the skull they diverge and expand the gill-sacs lying between them. The segments of each branchial arch are typically four in number, n...amed respectively pharyngobranchial, epibranchial, ceratobranchial, and hypobranchial. The first-named are situated in the dorsal wall 458 ELASMOBRANCHII [CH.
of the pharynx and are horizontal in direction ; the epi- and cerato- branchial stiffen the sides of the pharynx the ceratobranchial being the main portion of the arch, whilst the hypobranchial pieces are found in the ventral wall of the pharynx and converge to imite in a median plate, the basibranchial. To the ceratobranchials are attached a number of thin rods of cartilage which run outwards in the wall of the gill-sac and are called gill-rays.
What to read after Zoology An Elementary Text book?
You can find similar books in the "Read Also" column, or choose other free books by A E Arthur Everett Shipley to read onlineMoreLess
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