Last edited by Kajiramar
Wednesday, July 8, 2020 | History

2 edition of Saccus vasculosus in some teleosts found in the catalog.

Saccus vasculosus in some teleosts

Claes von Mecklenburg

Saccus vasculosus in some teleosts

by Claes von Mecklenburg

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  • 1 Currently reading

Published by [s.n.] in Lund .
Written in English

    Subjects:
  • Saccus vasculosus.,
  • Osmoregulation.,
  • Rainbow trout.

  • Edition Notes

    StatementClaes von Mecklenburg.
    Classifications
    LC ClassificationsQL639 .M43
    The Physical Object
    Pagination35 p. ;
    Number of Pages35
    ID Numbers
    Open LibraryOL4637327M
    LC Control Number77469081

    There is a dorsal choroid plexus and a ventral choroid plexus, called saccus vasculosus, which cavity continues that of the ventricle. The hypophysis or pituitary gland, occurs in the hypothalamus [link to endocrine system] and the gland is divided into neurohypophysis and adenohypophysis. The saccus vasculosus, a tissue unique to some bony and cartilaginous fish, may also represent a transporting epithelium involved in osmoregulation (Jansen et al. , ). PTHrP is secreted by the saccus vasculosus in bony fish (Devlin et al. ).

    Find This Book in Your Library Article Information Page Count: Some experimental and clinical observations concerning states of increased intracranial tension. Plexus und Meningen, Saccus Vasculosus. Schaltenbrand, G., and & Dorn, E., Eds. J. Boeke & Dammerman, K.W., The saccus vasculosus of fishes a receptive nervous organ and not a gland, in: KNAW, Proceedings, 13 I, , Amsterdam, , pp. This PDF was made on 24 September , from the 'Digital Library' of the Dutch History of Science Web Center ().

    Reproductive System, Nervous System, Sensory Organs, Endocrine System Comparative Anatomy study guide by mikebenanti7 includes 92 questions covering vocabulary, terms and more. Quizlet flashcards, activities and games help you improve your grades. Blood Ca levels are controlled by some endocrine glands in vertebrates. Endocrine glands concerning Ca homeostasis in vertebrates are cited in Fig. is well known that in fish, the pituitary gland raises blood Ca levels (Olivereau and Olivereau, ).Although hagfish, the most primitive fish in modern times, is found only in the sea, some lamprey live in freshwater, while others spend at.


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Saccus vasculosus in some teleosts by Claes von Mecklenburg Download PDF EPUB FB2

1) Dorn, E.: Der Saccus : Handbuch der mikroskopischen Anatomie des Menschen, Bd. IV/2, S. – Berlin-Göttingen-Heidelberg: Springer Google Cited by: 7. adshelp[at] The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86ACited by: 7.

On the saccus vasculosus in some Indian freshwater teleosts. Saccus vasculosus in some teleosts book Coronavirus: Find the latest articles and preprints On the saccus vasculosus in some Indian freshwater teleosts.

Rao PD. Die Naturwissenschaften, 01 May53(9): DOI: /bf PMID Cited by: 7. Ultrastructurally the coronet cells of Sparus saccus vasculosus resembled coronet cells described for other teleosts, with an abundant smooth endoplasmic reticulum (SER) which was more highly organized in the coronets.

IHC at EM level showed reaction mainly with the membranes of the by: The oval protruded saccus vasculosus situated on the ventral side of the diencephalon behind the pituitary.

This circumventricular organ contained a typical large central lumen lined by single stratified epithelium with characteristic coronet cells and supporting cells.

Ann Histochim. Apr-Jun;16(2) Histochemistry of the saccus vasculosus of some fresh water teleosts. Narasimhan PV, Sundararaj BI. The oval protruded saccus vasculosus situated on the ventral side of the diencephalon behind the pituitary. This circumventricular organ contained a typical large central lumen lined by single.

The saccus vasculosus is generally situated posterior to the pituitary gland, although in some teleosts, it is opposed to the hypophysis. In the present study, the saccus vasculosus in N. chitala was a sac-like protuberance on the ventral side of the brain and detached from the pituitary by an interspace, although it seemed to have no functional connection with the gland.

Saccus vasculosus of the tiger shark is paired organ situated on the dorsal side of hypophysis, while that of the teleosts is unpaired organ in the posterior portion of the hypophysis. In the teleosts, the distance between this organ and hypophysis is roughly divided into three grades.

The saccus vasculosus is a circumventricular organ of the hypothalamus of many jawed fish whose function has remained a mystery for more than years.

The book begins with the physicochemical properties of the NGF molecule, followed by the neuroglial participation in the removal of debris from damaged central nervous system (CNS). It discusses the regional distribution and biochemical characteristics of two steroid-binding systems, one for estradiol and the other for corticosterone.

The brain in teleosts is formed from five compartments which are from rostral to caudal; telencephalon or forebrain (contain 2 olfactory lobes and cerebrum), diencephalon (contain epithalamus. After few minutes the saccus vasculosus together with the rest of the brain was carefully removed from the cranium and instantly processed for histological and scanning electron microscopic studies.

Histological study The saccus vasculosus was fixed in aqueous Bouin’s fluid for hours. After fixation the tissues were washed. Rao [20] has studied the degree of vascularization especially at the area around the infundibulum and secretory activities of the saccus vasculosus of some teleosts.

He also noticed a rich vascularity in the hypothalamus of Amphipnus cuchia, but absence of saccus vasculosus and vascular elements in the posterior region of the infundibular wall.

The Development of Saccus vasculosus in Two Teleosts The Development of Saccus vasculosus in Two Teleosts Mecklenburg, Claes Abstract The development and differentiation of the ventro-caudal part of the diencephalon, the saccus infundibuli, has been examined in salmon, Salmo salar L., and in pike, Esox lucius L.

I n salmon, the saccus infundibuli becomes the saccus. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

saccus vasculosus is preserved. Thenoto-chord in the 30 h embryo is still present, andends somedistance above thejunction of the epithelium of Rathke's pouch with the wall of the brain vesicle.

Its position as shownin fig. 1 is not such as to influence mechanically the formation of. saccus prominent vasculosus ultrastructure a b s t r a c t We investigated the cytoarchitecture and surface ultrastructural characteristics of differ-ent cells lining the epithelium of the saccus vasculosus of Notopterus chitala (Hamilton, ).

The saccus vasculosus, the richly vascularized reddish, sac like organ is situated on the. The ultrastucture of the coronet cell of a large number of teleosts belonging to different orders was investigated. Tubular and vesicular components of the smooth endoplasmic reticulum occur in coronet cells and in globules of all the species examined.

Cell organelles such as lysosomes, Golgi systems, and mitochondria are predominantly located in the basal region of the cell. Modifications of. Neuronal and glial cell elements within the epithelium of the Saccus vasculosus in teleosts Summary The epithelium of the Saccus vasculosus of Perca fluviatilis consists of coronet cells and bipolar liquor contact neurones in a 4∶1 ratio, and supporting cells.

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Free ebooks since The succinic dehydrogenase activity registered by Legait and Legait () in the saccus of the trout also appears very modest, as pointed out by Narashiman and Sundararaj (), who claimed a more obvious activity in the saccus of some Indian fresh-water teleosts, and ascribed the discrepancy largely to differences in methodology.Previous studies in teleosts have revealed the presence of the intermediate filaments vimentin (Vim) and glial fibrillary acidic protein (GFAP) in glial cells of the spinal cord and/or some brain reg.