scholarly journals POSTNATAL HISTOLOGICAL DEVELOPMENT OF THE MALE REPRODUCTIVE ORGANS IN BARKI SHEEP. (b) HISTOLOGICAL DEVELOPMENT OF MALE ACCESSORY GLANDS

2002 ◽  
Vol 39 (1) ◽  
pp. 47-63
Keyword(s):  
Reproductive Organs ◽  
Male Accessory Glands ◽  
Accessory Glands ◽  
Male Reproductive Organs

scholarly journals Anatomy and Histology of Reproductive Organ of Male Guinea Pig As a Source of Learning

2017 ◽  
Vol 1 ◽  
pp. 9-18
Author(s):  
Elvira Mega Androma ◽  
Laela Umi Khasanah
Keyword(s):  
Guinea Pig ◽  
Prostate Gland ◽  
Reproductive Organs ◽  
Reproductive Organ ◽  
Student Response ◽  
Histological Structure ◽  
Accessory Glands ◽  
The Subject ◽  
Male Reproductive Organs ◽  
Readability Test

This study were aim to (1) describe the anatomical and histological structures of testicular organ, epididymis, vas deferens, accessory glands, and penis in guinea pig (2) develop learning media in the form of histological slides as well as anatomy atlas of male reproductive organs (3) examine the atlas of reproductive organs of male guinea pig as a source of learning. Slide were made using paraffin method with HE staining. The study revealed histological structure of the five guinea pig (Cavia porcellus) accessory glands, namely ampullary glands, seminal vesicles, prostate gland, bulbourethral gland, and preputial gland. In addition, guinea pig penis had a baculum on its base. The results of the student response test showed very good category with the percentage of 90,55%. The readability test had very good value from the subject expert (95,71%), media expert (81,66%), peer reviewer (88,07%) and biology teacher (81,51%). Overall, the atlas of the 'Anatomy of Male Reproductive Organs of Guinea Pig' had excellent quality and deserves to be used as a learning resource.

scholarly journals Histological Development of Male Reproductive Organs in Microminipigs

2016 ◽  
Vol 44 (8) ◽  
pp. 1105-1122 ◽  
Author(s):  
Akihisa Kangawa ◽  
Masayoshi Otake ◽  
Satoko Enya ◽  
Toshinori Yoshida ◽  
Masatoshi Shibata
Keyword(s):  
Giant Cell ◽  
Sexual Maturity ◽  
Multinucleated Giant Cell ◽  
Reproductive Organs ◽  
Tubular Structure ◽  
Structural Development ◽  
Tubular Atrophy ◽  
Accessory Glands ◽  
Male Reproductive Organs ◽  
Sexually Mature

Microminipigs are becoming increasingly attractive alternatives for various experimental applications, such as general toxicology studies, owing to their manageable size. However, there are limited studies on the male reproductive organs of microminipigs, particularly on the histological aspects of sexual maturity. To clarify the development of male reproductive organs, 35 male microminipigs, aged 0 to 12 months, were used in this study. Histological and histomorphological evaluation was performed based on spermatogenic development, measurement of tubular structure in testes and epididymides, and histological progress of accessory glands. In addition, spontaneous testicular changes were quantitatively assessed. Histologically, male microminipigs sexually matured around 4.5 months of age, when spermatogenesis in testes and structural development in genital organs were completed. Spontaneous testicular changes occurred in all the animals investigated. Multinucleated giant cell was most commonly observed, followed by hypospermatogenesis and tubular atrophy/hypoplasia. However, the number of affected tubules was less than 1% in testes after 4.5 months of age, suggesting that the influence of these changes on evaluation of toxicity studies may be minimal. It is preferable to use sexually mature animals in toxicology studies; therefore, the information obtained by the present study will be helpful for future toxicity evaluations in microminipigs.

Intrauterine development, functions and diseases of male reproductive organs

2010 ◽  
Vol 151 (39) ◽  
pp. 1573-1579
Author(s):  
Ákos Jakobovits ◽  
Antal Jakobovits
Keyword(s):  
Reproductive Organs ◽  
Intrauterine Development ◽  
Male Reproductive Organs

A szerzők a központi idegrendszer, a tesztoszteron és származékainak szerepét tárgyalják a férfi nemi szervek méhen belüli fejlődésében. A férfi személyiségét meghatározó jellegzetességek először az emberi fejlődés magzati stádiumában jelentkeznek. Ezek kialakulása a gyermekkorban folytatódik. Pubertás után ezek növekvő mértékben válnak nyilvánvalóvá, és az egyén élete folyamán túlsúlyban maradnak. Az említett folyamatok mind a férfias fenotípust, mind a férfias magatartást befolyásolják. A tesztoszteron és származékai kontrollálják a férfi nemi szervek fejlődését. Hiányuk a női nemi jellegzetességek túlsúlyához vezet, a férfi nemi kromoszómakép ellenére. E jelenségek típusos példája a testicularis feminisatio klinikai képe. Jelen tanulmány különleges figyelmet szentel a reprodukciós szervek azon rendellenességeinek, amelyek a magzatokban ultrahanggal azonosíthatók. Ezen anomáliák legtöbbje antenatalisan hatásosan nem kezelhető. Azok a rendellenességek, amelyek a méhen kívüli életben sem gyógyíthatók, a terhességmegszakítás javallatát képezhetik, amennyiben ultrahangvizsgálattal a kora terhességben kimutathatók. Orv. Hetil., 2010, 39, 1573–1579.

Ability of Some Progestational Steroids to Stimulate Male Accessory Glands of Reproduction in the Rat

1959 ◽  
Vol 100 (3) ◽  
pp. 540-543 ◽  
Author(s):  
S. C. Lyster ◽  
G. H. Lund ◽  
W. E. Dulin ◽  
R. O. Stafford
Keyword(s):  
Male Accessory Glands ◽  
Accessory Glands

scholarly journals Failed prey or peculiar necrolysis? Isolated ammonite soft body from the Late Jurassic of Eichstätt (Germany) with complete digestive tract and male reproductive organs

2021 ◽  
Vol 140 (1) ◽  
Author(s):  
Christian Klug ◽  
Günter Schweigert ◽  
Helmut Tischlinger ◽  
Helmut Pochmann
Keyword(s):  
Digestive Tract ◽  
Late Jurassic ◽  
Reproductive Organs ◽  
Mantle Cavity ◽  
Soft Body ◽  
Exceptional Preservation ◽  
Attachment Structures ◽  
Male Reproductive Organs ◽  
Marine Basins

AbstractAmmonoid soft parts have been rarely described. Here, we document the soft parts of a perisphinctid ammonite from the early Tithonian of Wintershof near Eichstätt (Germany). This exceptional preservation was enabled by the special depositional conditions in the marine basins of the Solnhofen Archipelago. Here, we document this find and attempt to homologize its parts with various organs such as the digestive tract, reproductive organs, the mantle cavity with gills, and the hyponome, with differing degrees of reservation. Alternative interpretations are also taken into account. We suggest that the soft parts were separated from the conch either taphonomically (following necrolytical processes affecting the attachment structures) or during a failed predation, where a predator (fish or coleoid) removed the soft parts from the conch but then dropped them. This find is interesting because it adds to the knowledge of ammonite anatomy, which is normally hidden in the conch. The reproductive organs show traces of what might have been spermatophores, thus supporting the hypothesis that the microconchs represented the males.

scholarly journals COLLABORATIVE WORK TO EVALUATE TOXICITY ON MALE REPRODUCTIVE ORGANS BY REPEATED DOSE STUDIES IN RATS : 16)EFFECTS OF SHORT-TERM ADMINISTRATION OF CARMOFUR ON SPERMATOGENESIS

2000 ◽  
Vol 25 (SpecialIssue) ◽  
pp. 163-171 ◽  
Author(s):  
Masakazu FURUKAWA ◽  
Toshio KARAKAMA ◽  
Masayoshi KAJI ◽  
Shinobu GOMITA ◽  
Masatoshi YOSHIMURA ◽  
...  
Keyword(s):  
Collaborative Work ◽  
Reproductive Organs ◽  
Repeated Dose ◽  
Short Term ◽  
Term Administration ◽  
Male Reproductive Organs

Memoirs: On the Development of the Male Genitalia and the Efferent Genital Ducts in Lepidoptera

1933 ◽  
Vol s2-76 (301) ◽  
pp. 35-61
Author(s):  
DEV RAJ MEHTA
Keyword(s):  
Male Genitalia ◽  
Abdominal Segment ◽  
Larval Instar ◽  
Ejaculatory Duct ◽  
External Genitalia ◽  
Reproductive Organs ◽  
Proximal Portion ◽  
Genital System ◽  
Larval Life ◽  
Accessory Glands

A general account of the internal reproductive organs and the external genitalia and their development is given. The ‘penis lobes’ develop earlier than the ‘valvae lobes’, and independently of them. The tegumen is the modified ninth tergite. The tenth segment is visibly distinguished into a tergal and sternal part in the pupal stages, and the anal tube passes between the two sclerites. The uncus and the gnathos are dorsal and ventral processes respectively of the tenth segment. The anellus lobes develop as lateral processes of the ninth sternite on either side of the penis. The vasa deferentia during larval life do not extend beyond the eighth abdominal segment and lie in a latero-ventral position. They meet the extensions from the ectodermal ‘ductus ejaculatorius duplex’ during the last larval stadium. From the earliest caterpillar stage there exists a pair of ectodermal ducts formed by the differentiation of the epidermis on the ninth sternite. Towards the end of larval life they divide by constriction to form the accessory glands and the ‘ductus ejaculatory duplex’. At this stage they extend on either side to meet the vasa deferentia. The vesiculae seminales develop by distension from the region of junction between the vasa deferentia and the proximal portion of the ejaculatory duct. The ‘ductus ejaculatorius simplex’ arises as an ectodermal invagination between the pair of ‘penis lobes’ during the final larval instar. It is established that, with the exception of the vasa deferentia, all the remaining elements in the efferent genital system are derived from the ectoderm.

The Drosophila melanogaster X-Linked mfs(1)6E Locus Is Required for Production of Normal Seminal Fluid by the Male Accessory Glands

2001 ◽  
Vol 267 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Pedro P. López ◽  
Juán F. Santarén ◽  
M.Fernanda Ruiz ◽  
Pedro Esponda ◽  
Lucas Sánchez
Keyword(s):  
Drosophila Melanogaster ◽  
Seminal Fluid ◽  
Male Accessory Glands ◽  
Accessory Glands
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