Fine structure of Sertoli cells in three marine snails with a discussion on the functional morphology of Sertoli cells in general

1986 ◽  
Vol 245 (2) ◽  
Author(s):  
John Buckland-Nicks ◽  
Fu-Shiang Chia
Keyword(s):  
Fine Structure ◽  
Functional Morphology ◽  
Sertoli Cells ◽  
Marine Snails

Fine structure and functional morphology of the mouthparts of a maleVeigaia sp. (Gamasida: Veigaiidae) with remarks on the spermatodactyl and related sensory structures

2006 ◽  
Vol 267 (2) ◽  
pp. 208-220 ◽  
Author(s):  
Antonella Di Palma ◽  
Gerd Alberti ◽  
Giorgio Nuzzaci ◽  
Gerald W. Krantz
Keyword(s):  
Fine Structure ◽  
Functional Morphology ◽  
Sensory Structures

The Biology of Bothrimonus (=Diplocotyle) (Pseudophyllidea: Cestoda): Detailed Morphology and Fine Structure

1974 ◽  
Vol 31 (2) ◽  
pp. 147-153 ◽  
Author(s):  
M. D. B. Burt ◽  
I. M. Sandeman
Keyword(s):  
Electron Microscopy ◽  
Nervous System ◽  
Fine Structure ◽  
Functional Morphology ◽  
Light And Electron Microscopy ◽  
Nerve Fibers ◽  
Fish Host ◽  
Extensive System ◽  
And Function

Light and electron microscopy were used to describe the functional morphology of Bothrimonus sturionis in detail. In particular, the musculature, nervous system, osmoregulatory system, and tegument are dealt with, and the findings compared with those of other workers. The musculature of the scolex consists of several interrelated systems, the structure of each being discussed in relation to its function. Associated with the regular nervous system, considered typical of cestodes, is an extensive system of giant nerve fibers. The osmoregulatory system is unusual in that there are lateral "excretory" pores in many proglottides which open directly to the exterior of the worm. The microtriches of the tegument are long, like those of other primitive cestodes, and are covered by a noncellular sheath while the worm is in its gammarid host. The sheath is lost when the worm becomes established in its fish host; the nature and function of the sheath are discussed.

scholarly journals Cellular morphology of leg musculature in the water bear Hypsibius exemplaris (Tardigrada) unravels serial homologies

2019 ◽  
Vol 6 (10) ◽  
pp. 191159 ◽  
Author(s):  
Vladimir Gross ◽  
Georg Mayer
Keyword(s):  
Fine Structure ◽  
Functional Morphology ◽  
Cellular Structure ◽  
Evolutionary History ◽  
Ancestral State ◽  
Leg Muscles ◽  
Open Questions ◽  
Attachment Sites ◽  
Functional Implications ◽  
Water Bears

Tardigrades (water bears) are microscopic, segmented ecdysozoans with four pairs of legs. Lobopodous limbs that are similar to those seen in tardigrades are hypothesized to represent the ancestral state of Panarthropoda (Tardigrada + Onychophora + Arthropoda), and their evolutionary history is important to our understanding of ecdysozoan evolution. Equally important is our understanding of the functional morphology of these legs, which requires knowledge of their musculature. Tardigrade musculature is well documented but open questions remain. For example, while the muscular organization of each trunk segment and its legs is unique, three of the four trunk segments are nevertheless relatively homonomous. To what extent, then, do leg muscles show segmental patterns? Specifically, which leg muscles are serially repeated and which are unique? The present study addresses these questions using a combination of techniques intended to visualize both the overall layout and fine structure of leg muscles in the eutardigrade Hypsibius exemplaris . In doing so, we propose serial homologies for all leg muscles in each of the four legs and reveal new details of their cellular structure and attachment sites. We compare our results to those of previous studies and address the functional implications of specialized muscle cell morphologies.

Fine structure of monkey (Macaca mulatta) Sertoli cells after treatment with cyproterone

Andrologia ◽  
2009 ◽  
Vol 7 (4) ◽  
pp. 317-328 ◽  
Author(s):  
G. AUMÜLLER ◽  
B. SCHENCK ◽  
F. NEUMANN
Keyword(s):  
Fine Structure ◽  
Macaca Mulatta ◽  
Sertoli Cells

scholarly journals Fine Structure of the Sertoli Cells of the Rat Testis in Experimental Unilateral Cryptorchidism

1980 ◽  
Vol 3 (1-6) ◽  
pp. 301-311 ◽  
Author(s):  
G. Aumüller ◽  
K. Hartmann ◽  
U. Giers ◽  
B. Schenck
Keyword(s):  
Fine Structure ◽  
Sertoli Cells ◽  
Rat Testis ◽  
Unilateral Cryptorchidism

scholarly journals PERMANGANATE FIXATION OF THE GOLGI COMPLEX AND OTHER CYTOPLASMIC STRUCTURES OF MAMMALIAN TESTES

1960 ◽  
Vol 8 (3) ◽  
pp. 761-775 ◽  
Author(s):  
Hilton H. Mollenhauer ◽  
William Zebrun
Keyword(s):  
Fine Structure ◽  
Guinea Pig ◽  
Golgi Complex ◽  
Sertoli Cells ◽  
Close Association ◽  
High Electron ◽  
Cell Organelles ◽  
Different Dimensions ◽  
Morphological Differences ◽  
Cytoplasmic Structures

Observations on the fine structure of KMnO4-fixed testes of small mammals (guinea pig, rat, and mouse) reveal certain morphological differences between the spermatogenic and Sertoli cells which have not been demonstrated in the same tissue fixed with OsO4. Aggregates of minute circular profiles, much smaller than the spherical Golgi vesicles, are described in close association with the Golgi complex of developing spermatids. Groups of dense flattened vesicles, individually surrounded by a membrane of different dimensions than that which bounds most of the other cell organelles, appear dispersed within the cytoplasm of some spermatogenic cells. Flattened vesicles of greater density than those belonging to the Golgi complex are reported confined to the inner Golgi zone of developing guinea pig spermatids between the Golgi cisternae and the head cap. The profiles of endoplasmic reticulum within spermatocytes appear shorter, wider, and more tortuous than those of Sertoli cells. Minute cytoplasmic particles approximately 300 A in diameter and of high electron opacity appear randomly disposed in some Sertoli cells. Groups of irregular-shaped ovoid bodies within the developing spermatids are described as resembling portions of cytoplasm from closely adjacent spermatids. Interpretation is presented regarding the fine structure of KMnO4-fixed testes in view of what has already been reported for mammalian testes fixed in OsO4.

Fine structure of sertoli cells in the camel (Camelus dromedarius)

1986 ◽  
Vol 10 (1) ◽  
pp. 37-46 ◽  
Author(s):  
D.I. Osman ◽  
L. Plöen
Keyword(s):  
Fine Structure ◽  
Sertoli Cells ◽  
Camelus Dromedarius
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