|
| |
| | Cycle of seminiferous epithelium |
 | | However, if you examine a histological section of rat testis, you will not see the complete process represented in any particular seminiferous tubule. | | | Cycle of the seminiferous epithelium in the rat testis | | | Stages of the cycle of the seminiferous epithelium in the rat testis |
|
http://www-personal.umich.edu/~akc/cycleSE.htm
|
|
| |
| | Publications |
| | Acute, whole body microwave exposure and testicular function of rats. | | | Johnson, L. A new approach to quantification of Sertoli cells that avoids problems associated with the irregular nuclear surface. | | | A comparative morphologic study of human germ cells in vitro and in situ within seminiferous tubules. |
|
http://www.cvm.tamu.edu/johnsonslab/pubs.html
|
|
| |
| | Tribulus Terrestris Pharmacological Studies [www.tribestan.com] Relieves menopausal symptoms PMS ovulation |
| | The experimental data on the biological activity of Tribestan show that its oral administration to rats significantly increased the number of spermatogonia, spermatocytes and spermatids, without any changes in the diameter of the seminiferous tubules. | | | The number of spermatids in phase VII varied from 148 to 180 per seminiferous tubule in the treated animals (mean value 176). | | | This fact is associated with the confirmed stimulating effect on spermatogenesis as a whole. |
|
http://www.bpg.bg/tribestan/pharmacology.phtml
|
|
| |
| | Blue Histology - Male Reproductive System |
| | From the mediastinum, delicate fibrous septa radiate towards the tunica albuginea and divide the parenchyma of the testis into about 300 lobuli testis, which communicate peripherally. | | | Choose subject area "reproductive and urinary systems " on the Quiz page. | | | Look at different tubules to see different stages of spermio- and spermatogenesis. |
|
http://www.lab.anhb.uwa.edu.au/mb140/CorePages/MaleRepro/malerepro.htm
|
|
| |
| | Reproductive Biology and Endocrinology Full text Understanding spermatogenesis is a prerequisite for treatment |
| | The process of spermatogenesis in the seminiferous tubules is maintained by different internal and external influences. | | | Under conditions of inflammation or testicular cancer, the number of macrophages is increased. | | | Testosterone influences not only spermatogenesis in the seminiferous tubules of the testis but is also distributed throughout the body and provides feedback to the hypophysis related to the secretory activity of Leydig cells. |
|
http://www.rbej.com/content/1/1/107
|
|
| |
| | The Mammalian Testis |
| | Note the differences in cell morphology from the external (peripheral) edge of the tubule toward the internal (lumenal) edge. | | | This is a section through the testis showing numerous seminiferous tubules. | | | This shows the walls of several seminiferous tubules. |
|
http://www.uoguelph.ca/zoology/devobio/210labs/testes1.html
|
|
| |
| | Zocor Warnings & Precautions - simvastatin - HealthScout |
| | No microscopic changes were observed in the testes of rats from either study. | | | At 180 mg/ kg/ day, (which produces exposure levels 22 times higher than those in humans taking 80 mg/ day based on surface area, mg/ m 2), seminiferous tubule degeneration ( necrosis and loss of spermatogenic epithelium) was observed. | | | In dogs, there was drug-related testicular atrophy, decreased spermatogenesis, spermatocytic degeneration and giant cell formation at 10 mg/ kg/ day, (approximately 2 times the human exposure, based on AUC, at 80 mg/ day). |
|
http://www.healthscout.com/rxdetail/1/3/3/main.html
|
|
| |
| | Digital Atlas of Fathead Minnow Histology: REPRODUCTIVE SYSTEM - MALE |
| | Caudally the ductus deferens from each lobe merge before exiting at the genital orifice located between anus and urinary pore. | | | These mesenteries, termed mesorchia, encase a thin tunica albuginea which, in turn, encases the testicular lobes. | | | Spermatogenesis, the maturation of germ cells to spermatozoa, takes place within the seminiferous tubules. |
|
http://www.aquaticpath.umd.edu/fhm/male.html
|
|
| |
| | FASEB J. -- Sign In Page |
| | Dual control of seminiferous tubule contractility mediated by ETA and ETB endothelin... |
|
http://www.fasebj.org/cgi/content/abstract/11/4/276
|
|
| |
| | LM of rat seminiferous tubule |
| | Detail of germ cells, Sertoli cells and residual bodies are seen in this semithin section of a rat seminiferous tubule, which is at stage 8 in the cycle of the seminiferous epithelium. |
|
http://www-personal.umich.edu/~akc/Bibliography/KRBGst.htm
|
|
| |
| | Cardiovascular and Defense |
| | This slide shows only seminiferous tubules and some tunica albuginea. | | | Note also how it differs from the seminiferous tubules which have a very different structure. | | | Look for lumen that are relatively large within the mediastinum but close to the seminiferous tubules. |
|
http://www.fsu.edu/~histo/for~1.htm
|
|
| |
| | HighBeam Research: Library Search: Results |
| | Polycyclic aromatic hydrocarbon-induced cytotoxicity in cultured rat Sertoli cells involves differential apoptotic response. | | | histopathologic examination, we classified seminiferous tubules into 14 stages (stages... | | | We examined 300-500 seminiferous tubules in each rat to calculate the percentage of postmeiotic seminiferous tubules at PNDs 31 and 48. |
|
http://www.highbeam.com/library/search.asp?M=Y&Q=seminiferous
|
|
| |
| | MALE REPRODUCTIVE SYSTEM |
| | Such a cell (part of seminiferous tubule boundary tissue) is apparently contractile, thereby aiding sperm transport out of tubule lumen. | | | Examine the interstitial tissue (the tissue between the seminiferous tubules). | | | Since the secondary spermatocytes are present for less than a day, it is rare to see them in the seminiferous epithelium, and you will not have to identify them. |
|
http://medocs.ucdavis.edu/CHA/402/labsyl/03/lab/15.htm
|
|
| |
| | Seminiferous tubule involution in elderly men. |
| | The development of tubular involution is similar to that reported after experimental ischemia, which also seems to cause nonspecific effects on the testis such as multinucleate cells, vacuoles, and increased lipids in Sertoli cells. | | | The observation of different types of seminiferous tubules (from tubules with normal spermatogenesis to sclerosed tubules) in aging human testes points to the progressive stages of tubular involution in elderly men. | | | This leads to the formation of sclerosed tubules, some of which display a low seminiferous epithelium consisting of a few cells--including lipid-loaded Sertoli cells and both Ap and Ad spermatogonia--and others, showing complete sclerosis, are devoid of seminiferous epithelium. |
|
http://www.arclab.org/medlineupdates/abstract_3593859.html
|
|
| |
| | The Testes 2 |
| | After studying this, have a look at a sperm smear to get an idea of what sperm look like when you look them in the eye.. | | | Here you will see a few slides showing seminiferous tubule cells in various stages of spermatogenesis. | | | The two images below are both from the boxed area, but were photographed at different levels of focus within the section. |
|
http://www.uoguelph.ca/zoology/devobio/210labs/testes2.html
|
|
| |
| | Temporal relationship between androgen-dependent changes in the volume of seminiferous tubule fluid, lumen size and ... |
| | This study assessed whether changes in production of seminiferous tubule fluid underlie the previously described androgen-dependent changes in protein secretion by seminiferous tubules at stages VI-VIII of the spermatogenic cycle. | | | Temporal relationship between androgen-dependent changes in the volume of seminiferous tubule fluid, lumen size and seminiferous tubule protein secretion in rats | | | Temporal relationship between androgen-dependent changes in the volume of seminiferous tubule fluid, lumen size and seminiferous tubule protein secretion in rats -- Sharpe et al. |
|
http://www.reproduction-online.org/cgi/content/abstract/101/1/193
|
|
| |
| | seminiferous tubule - BlueRider.com |
| | any of the numerous long convoluted tubules in the testis which are the sites where spermatozoa mature |
|
http://seminiferous_tubule.bluerider.com/wordsearch/seminiferous_tubule
|
|
| |
| | SEM of rat seminiferous tubule |
| | Scanning electron micrograph of a seminiferous tubule from rat testis | | | The outer surface of the seminiferous tubule is covered with very flat epithelial cells, whose nuclei appear as small bulges. | | | The seminiferous tubule shown in this scanning electron micrograph was pulled apart during preparation for microscopy, allowing germ cells, Sertoli cells and sperm tails to be seen. |
|
http://www-personal.umich.edu/~akc/Bibliography/SEMst.htm
|
|
| |
| | Ed's Histology Notes: Male |
| | The process proceeds through various stages at various places in the tubules, as waves. | | | You'll be surrised how few Leydig cells there are; you'll need to search to find the "5 per seminiferous tubule" in a cross-section. | | | Around the tubules is a layer of smooth muscle which contracts during emission (i.e., the phase in which semen enters the urethra, just before ejaculation). |
|
http://www.pathguy.com/manhisto.htm
|
|
| |
| | Michael Skinner, Ph.D. |
| | Fritz, I.B., Skinner, M.K. and Tung, P.S. (1986) The nature of somatic cell interactions in the seminiferous tubule. | | | Kovacs, W.J., Turney, M.K. and Skinner, M.K.: (1988) Physiochemical comparisons of an affinity labeled protein from human genital skin fibroblast cytosol with authentic non-covalently labeled androgen receptor complexes from the same cells. | | | Skinner, M.K. and Fritz, I.B. (1985) Structural characterization of proteoglycans produced by testicular peritubular cells and Sertoli cells. |
|
http://www.skinner.wsu.edu/Bios/skinnercv.htm
|
|
| |
| | Flow microfluorometric identification of liver cells with elevated gamma-glutamyltranspeptidase activity after ... |
| | Ultrastructural changes in the seminiferous tubule wall and intertubular blood vessels in human cryptorchidism. | | | Testes appeared normal until the 10th yr, when progressive alterations were observed with the onset of puberty and through the adult age both in retained testes and cases of testes that descended through chemical or surgical methods before or after puberty. | | | In this study, we concluded L-type voltage-activated Ca2+ current was recognized in activated stellate (myofibroblast-like) cells. |
|
http://dreampharmaceuticals.com/ref-collagen/collagen-research-abs5.1304.html
|
|
| |
| | MSN Encarta - Search Results - tubule |
| | Invertebrates do not have kidneys, but they do have organs that work in similar ways to remove and excrete waste from the bloodstream. | | | Search Amazon.com for books about your topic, "tubule" | | | anatomy of seminiferous tubules, definition, diagrams and illustrations |
|
http://encarta.msn.com/tubule.html
|
|
| |
| | MRC Human Reproductive Sciences Unit |
| | McLaren, T. T., Foster, P. and Sharpe, R. Identification of stage-specific changes in protein secretion by isolated seminiferous tubules from rats following exposure to short-term local testicular heating. | | | In: "Molecular and Cellular Endocrinology of the Testis: Ernst Schering Research Foundation Workshop, Supplement 1" pp 115-142. | | | Sharpe, R. M., Kerr, J. B., McKinnell, C. and Millar, M. Temporal relationship between androgen-dependent changes in the volume of seminiferous tubule fluid, lumen size and seminiferous tubule protein secretion in rats. |
|
http://www.hrsu.mrc.ac.uk/publications/1994.php
|
|
| |
| | Untitled |
| | The blue cells indicate the presence of rat spermatogenesis w hich produces normal rat spermatozoa that can be found in the mouse epididymis. | | | Note Sertoli cells on basement membrane and absence of germ cells; in the third frame are seen seminiferous tubules of a mutant Wv/Wv recipient mouse which contain only Sertoli cells and lack endogenous germ cells. | | | The film strip shows in sequence the technique for microinject ing cells using two procedures: rete testis and collecting duct injection. |
|
http://www.ijdb.ehu.es/feb.htm
|
|
| |
| | Evidence for a defective seminiferous tubule barrier in testes of Tfm and Sxr mice -- Fritz et al. 67 (2): 359 -- ... |
| | Independent approaches to detect an impairment in the seminiferous tubule barrier of testes from Tfm/Y mice consisted of estimations of the osmotic barrier to hypertonic LiCl, using histological techniques, and determination of the testis sucrose space in vivo. | | | Evidence for a defective seminiferous tubule barrier in testes of Tfm and Sxr mice -- Fritz et al. | | | The competence of the seminiferous tubule barrier was evaluated by determining the sucrose space in isolated testis preparations obtained from adult wild-type mice and from mutants having defects in spermatogenesis. |
|
http://www.reproduction-online.org/cgi/content/abstract/67/2/359
|
|
| |
| | Male page 5 |
| | Notice that the spermatocytes to the left of the blue arrows have not divided, while to the right of the blue arrows contains many actively dividing cells (in meiosis I.) Click here for a complete explanation. | | | Germ cells mature together along the seminiferous tubule in a wave-like fashion. |
|
http://www.kumc.edu/instruction/medicine/anatomy/histoweb/male/male05.htm
|
|
| |
| | klinefelter,Chromosome 4 XY/47 XXY (Mosiac),Chromosome 48 XXXY,Chromosome 48 XXYY,Chromosome XXY,Hypergonadotropic ... |
| | klinefelter,Chromosome 4 XY/47 XXY (Mosiac),Chromosome 48 XXXY,Chromosome 48 XXYY,Chromosome XXY,Hypergonadotropic Hypogonadism,Primary Hypogonadism,Seminiferous Tubule Dysgenesis,klinefelter,Chromosome 4 XY/47 XXY (Mosiac),Chromosome 48 XXXY,Chromosome 48 XXYY,Chromosome XXY,Hypergonadotropic Hypogonadism,Primary Hypogonadism,Seminiferous Tubule Dysgenesis |
|
http://www.icomm.ca/geneinfo/klinefel.htm
|
|
|
