bluuebunny/crossref_metadata_2025_split huggingface dataset:
Estudio histológico comparativo del aparato reproductivo de llama hembra (Lama guanicoe glama)*
Authors: Arias Patricio , Feder Fritz‐Helmut , Porcel Ricardo , Cox José 
Published: June 2007

SummaryComparative histological study of the reproductive system of the female llama (Lama guanicoe glama)In the present study a cytological, histological and morphometrical comparison between the ovaries of the llama, the cow and the sheep is presented, at two phases of the ovarian cycle. There were found differences in the amount of primordial and primary follicles, the size of secondary follicles and follicular cells, and type and distribution of the connective tissue inside the stroma of the ovary. It would be necessary to study the fine structure of the ovary and the so‐called “embryological remanents”, for its permanent appearance in most (50 %) of the ovaries.
A Stenosis of the Isthmus Aortae Concurrent with Multiple Defects in a Calfheart An Attempt at an Embryological and Phylogenetical Explanation
Authors: Nie C. J. Van 
Published: June 2007

SummaryThe findings in a calfheart with multiple ventricular septum defects and an isthmus stenosis in an aorta with its origin in the right ventricle have been described and discussed. The anomalies are explained embryogenetically as well as phylogenetically. No choice could be made between the theories. The author states: The phylogenetic theory needs more attention in future comparative studies of anomalies of the heart.
The Anatomy of the Omasum of some Zambian Game Species
Authors: Stafford K. J. , Stafford Y. M. 
Published: June 2007

SummaryThe gross anatomy of the omasum of 11 different Zambian game species are described. These include Roan Antelope, Sable Antelope, Wildebeest, Kudu, Kafue Lechwe, Puku, Reedbuck, Impala, Bushbuck, Oribi and Duiker. Lamellar area and papilla density and shape are reported.
Differentiation of Ependymal Surface of Lateral Ventricles in Fetus and Newborn Rabbits: Observations by SEM
Authors: Abbate F. , Laura R. , Muglia U. , Vita G. , Bronzetti P. 
Published: June 2007

SummaryThe ultrastructural modifications that occur on the ependymal surface of the lateral ventricles of prenatal rabbit brains at 25, 27, 29 days of pregnancy, of term fetuses (30–31 days) and of 5, 10, 15 day old newborn rabbits, were studied by a SEM. On the ependymal surface the cilia, usually associated in tufts and the microvilli, variable in size and number, that surround them, show a rate of development correlated to the age. The results show the early differentiation of the surface features commensurated with early cerebrospinal fluid (CSF) functioning.
Cronología de Osificación Postnatal de las Articulaciones del Hombro y Codo en el Gato Siamés (Felts catus L.)
Authors: Vazquez‐Auton J.Ma , Villa Lopez Ma.I. , Moreno F. , Gil F. , Latorre R. 
Published: June 2007

SummaryChronology of the postnatal ossification of the shoulder and cubit joints of the Siam cat (Felts catus L.)A study was done by radiological techniques to show the chronology of ossification of the shoulder and cubit joints in the Siam cat, from birth up to the 25th week of postnatal development. For this experiment we used 40 little cats (19 males and 21 females) belonging to 11 litters subjected to different controls: pattern race, healthy, feeding, growing up and radioactivity. The time of the appearance and the evolution of the ossification centers is determined as well as the phenomenon of fusion during this time. The postnatal ossification from both joints of the Siam cat is compared with that of the common cat.
Cronología de Osificación Postnatal del Autópodo Torócico en el Gato Siamés (Felis catus L.)*
Authors: Lopez Ma.I. Villa , Vazquez‐Auton J.Ma. , Moreno F. , Gil F. , Latorre R. , Zarzosa G. Ramirez 
Published: June 2007

SummaryChronology of the postnatal ossification of the Thoracic autopodo in the Siam cat (Felis catus L.)A study was done by radiological techniques to show the chronology of ossification of the thoracic autopodo of the Siam cat from birth up to the 25th week of postnatal development. For this experiment we used 40 little cats (19 males and 21 females) belonging to 11 litters subjected to different controls: pattern race, healthy, feeding, grow up and radioactivity. The time of the appearance and evolution of the centres that form the basipodo, metapodo and acropodo of the thoracic limb is determined. Likewise it is analized the phenomenon of fusion during that time to define the main ossification sequence in the carpo. The aspects of the postnatal ossification of the thoracic autopodo in the Siam cat are compared with the literature of differents authors about the common cat.
Histology and Histomorphometry of the Tibial Diaphyseal Growth in Two Turkey Strains during the First Six Weeks after Hatching
Authors: Wyers Monique , Hamon J. C. , Cherel Y. , Plassiart G. 
Published: June 2007

SummaryThe comparative cortical growth of the tibio‐tarsus was studied during the first six weeks after hatching in two turkey strains, a light and a heavy one. At one day post‐hatching the cortical appeared to be constituted in both strains of an embryonary non‐active fibrous bone tissue which had completely disappeared at one week. On and after one week the cortice was constituted of a fibrolamellar adult bone tissue elaborated on the periosteal part of the cortex. Its vascular pattern depended on the strain and on the thickness of the cortical faces. The histomorphometrical studies showed that the growth in thickness was earlier and faster in the heavy strain with a Total Diaphyseal Surface twice larger at 6 weeks but a Diaphyseal Cortical Ratio not significantly different since 3 weeks of age.
Lectin Histochemistry of Glycoconjugates in Horse Salivary Glands
Authors: Gargiulo Anna Maria , Pedini Vera , Ceccarelli P. 
Published: June 2007

SummaryThe glycoconjugate content of major horse salivary glands was investigated by means of horseradish peroxidase‐conjugated lectins. Qualitative differences were observed in the terminal sugar residues of secretory glycoproteins and glycoconjugates linked to the apical surface of excretory duct epithelial cells. Mucous acinar cells in mandibular and sublingual glands contained oligosaccharides with D‐galactose, α‐ and β‐N‐acetylgalactosamine, N‐acetylglucosamine and fucose residues, whereas mandibular, sublingual and parotid serous cells contained only oligosaccharides with terminal α‐ and β‐N‐acetylgalactosamine residues. The apical portion of striated and interlobular duct lining cells of mandibular and sublingual glands stained for α‐ and β‐N‐acetylgalactosamine and for N‐acetylglucosamine. In parotid gland the cytoplasm of intercalated duct cells and the apical surface of striated duct epithelial cells stained for α‐N‐acetylgalactosamine.
Estudio Radiológico del Esternón del Ovino en Crecimiento
Authors: Guillen M. T. , Robina A. , Regodon S. 
Published: June 2007

SummaryRadiological investigation of the sternum of the sheepA radiological investigation of the sternum of the sheep demonstrated distinct growth phases. Forty Merino sheep of mixed breeds were distributed into 4 age groups of 0, 45, 105 and 270 days. Each animal was radiographed in sternal and lateral recumbency. Measurements were made from the radiographs.The sternebra are rectangular in newborn and become concave in adult. The curvature of the sternum is 16 to 17° at day 0 and 27–28° at day 270. The nucleus of ossification was seen in all sternebrae at 45 days of age, they were present only in the most caudal sternebrae at 105 days.
Actinfilaments in the Ruminal Epithelium of Cattle
Authors: Kressin M. , Koob B. , Schnorr B. 
Published: June 2007

SummaryPhalloidin and immunogold labeling were used to localize actinfilaments in the ruminal pilar epithelium of adult catde on the light and electron microscopic level.Incubation with rhodaminyl‐phalloidin permitted an overview of general actin distribution pattern. Distinct subcellular localization of actin was revealed with the biotin‐streptavidin bridge technique in a postembedding procedure. Superior fixation of membranes and filaments was achieved with tannic acid‐glutaraldehyde. Surface‐etching prior to immunoincubation ensured restoration of actin immunoreactivity.Patterns of distribution in non‐keratinized and keratinized epithelial cells as well as in pericytes and endothelial cells point to cell‐specific cytoskeletal and motile functions of actinfilaments.
Modelos Matematicos Aplicados al Crecimiento Gástrico Ovino durante la Vida Intrauterina
Authors: Franco A. , Rodriguez P. L. , Mayoral A. I. , Guillen M. T. , Robina A. 
Published: June 2007

SummaryMathematical models describing the histomorphometric growth of ruminant stomach during prenatal lifeOne hundred forty four ovine embryos and feti were used in an investigation to determine mathematical models describing the histomorphometric growth of tissues and compartments of the ruminant stomach. The results indicate that during prenatal life the diameter of the gastric chambers increase more slowly than the length. The tissue layers of the gastric walls, particularly the muscular tunic of all compartments demonstrated a uniform tendency toward more rapid development than the compartment walls proper.
The Structure of the Harderian Gland of the Guinea Fowl at Embryonic and Post Embryonic Stages
Authors: Onyeanusi B.I. , Ema A.N. , Ezeokoli CD. , Onyeanusi J.C. 
Published: June 2007

SummaryThe Harderian gland of the guinea fowl is a bright, pink and relatively large orbital organ situated at the ventromedial aspect of the orbit. It possesses a single duct that has its exit on the convex medial surface. The outline is irregular with its caudal half narrower than the rostral half, and possessing a slight constriction about the mid point.Histologically, the gland had been outlined with the existence of a large contorted lumen by day 18 of incubation. The surface epithelial lining showed two layers of cells all through and lymphocytes were also present.By day 19 of incubation, certain zones of the surface epithelium had become pseudostratified and some of these cells contained vacuoles indicative of secretory materials within their cytoplasm.By day 21, few definitive acini with lumina had been observed and at day 23, the epithelium had assumed only a single layer of cells that were tall columnar cells, except at the junctions of the folds.By day 24, the tunica propria seemed to have completely disappeared with the acini occupying every available space. Plasma cells were seen three days after hatching.
Changes in the Peritoneum during the Development of the Testis, Epididymis and Ductus Deferens in the Pig
Authors: Martin E. , Rodriguez‐Martinez H. 
Published: June 2007

SummaryThe development of the peritoneal folds of the testis, epididymis and ductus deferens of the pig prior to testicular descent was studied in 18 to 82 days‐old embryos/fetuses. The parietal attachment of the mesonephros, mesonephric and paramesonephric ducts and gubernaculum constituted the urogenital mesentery. This could be divided in a cranial and a caudal part. The first fixed the mesonephros and had a mesogonad as a secondary fold. The second had two branches, one laterally to the umbilical artery belonging to the gubernaculum (Plica gubemacularis) and the medial to the artery contained the meso‐ and paramesonephric ducts. The mesogonad was related caudally with Plica gubemacularis. The fold of the meso‐ and paramesonephric ducts could also be divided in two parts. The caudal was a primary component of the urogenital mesentery, while the cranial was first ventral and later lateral to the mesogonad (mesorchium) and appeared as a secondary fold of the urogenital mesentery (cranial part). A vascular fold contributed to separate the suspensory ligament of the testis from the developing mesorchium. The proposed meaning of the terms used might be useful for comparative studies.
The Anatomy of the Cloacal Bursa (Bursa of Fabricius) in the Helmeted Guinea Fowl (Numida meleagris galeata)
Authors: Onyeanusi B. I. , Ezeokoli C. D. , Onyeanusi J. C. , Ema A. N. 
Published: June 2007

SummaryThe cloacal bursa (bursa of Fabricius) in the guinea fowls appeared either as an oval blind sac with a short thick stalk in one group or had a pointed cranial blind end with a slightly bulging middle part that was followed by a thick caudal stalk in the other group. Both groups of bursae originated from the proctodeal wall of the cloaca and were placed dorsal to the rectum. The average length of the bursa was 18 mm while the average width at die mid section was 15 mm. The internal surface showed about 12 – 14 primary folds.Histologically, the outline of the bursa was well established by day 18 of incubation. The primary folds had also been formed. Lymphocytes had already been encountered within the framework of the bursa at this day. The epithelium bordering the tunica propria was composed principally of two layers of cuboidal cells. Epithelial buds had also formed and some were already detached from the epithelial lining. The blood vessels present were positioned just beneath the outer covering.At day 19 of incubation, most of the epithelial buds had two layers of cells arranged in a circumscribed manner while a few had three layers of cells. Blood vessels had increased in number and were deeper placed inside the bursa than previously.At day 20, the cells of the upper layer of the epithelium were dorsoventrally flattened and stained paler than the cells of the lower layer. It was possible to distinguish the cortex from the medulla and the basement lining between both zones was distinct. Tiny vesicles within the cytoplasm of the epithelial cells at the mucosa and follicles were observed. Macrophges were also observed within the gland.At day 21, blood vessels were observed in the cortex of the follicles. The maximum number of primary folds (14) had been formed.At day 22, serveral follicles had severed connections with the mucosal epithelium. The mucosal lining had dropped to a single layer of cells in some areas. Goblet cells were observed amongst the mucosal cells. A plasma cell had first appeared.By day 25, dead cells had increased quite in number and there was also an increase in number of medium and small‐sized lymphocytes within the gland.By day 26, the upper layer of the surface epithelium was composed primarily of tall columnar cells with numerous large vacuoles. Macrophages had suddenly increased within the thin interfollicu‐lar spaces and most of them were crowded internally with various sizes of debris.By day one post‐hatch, each fold was completely filled with follicles that were separated by thin connective tissue strands.
Regularities and Irregularities in the Structure of the Seminiferous Epithelium in the Domestic Fowl (Gallus domesticus)
Authors: Tiba T. , Shimizu Y. , Kita I. , Tsubota T. 
Published: June 2007

SummaryIt was investigated in the domestic fowl, whether a mechanism for a synchronous start of the proliferation of the differentiating spermatogonia in a transversely cut seminiferous tubule (called the “co‐ordination” between germ cell association) operates effectively in this species. A trapezoid‐shaped cellular association demarcated by two perpendiculars from the tubular lumen to the basement membrane was the unit of observation (provisionally called a “column” Each column is composed of a bundle of elongate spermatids and the neighbouring, various types of germ cells). The extent of closeness of the co‐ordination was examined in a total of 2,650 columns, based on the continuity of the spermiogenic sptep‐number of the youngest generation of spermatids within adjacent columns. In no case did all columns in a tubular cross section show the same‐step spermatids. In most cases (50.2 % of 2,650 columns), the same number was kept in only 2 to 6 adjacent columns. The arrangement of different but consecutive numbers (e. g., 1–2–3 or 1–2‐1) was observed in a total of 882 columns. The co‐ordination mechanism, therefore, is considered to work, albeit incomplete, among a limited number of adjacent columns in this species.
Flavine, Oxidative and Hydrolytic Enzyme Activity in the Skin of Sana, Togemburg and Balkan Engrafted Kid Breeds
Authors: Mihelić D. , Hraste A. , Babić K. , Gjurčević‐Kantura Vesna , Janicki Z. 
Published: June 2007

SummaryFlavine, oxidative and hydrolite enzyme activity in the togenburg, sana and Balkan engrafted kid breeds, skin from the back, abdomen and leg areas was investigated. The strongest activity of the enzymes was found in the connective tissue, muscular tissue cells and sebaceous glands while the weaker activity was found in epidermis and hair folicul cells. Those are slight differences in the activity of the investigated enzymes among kid groups in the investigated part of the body.
Zur Articulatio temporomandibularis der Hauskatze (Felis silvestris catus)*
Authors: Knospe C. , Roos H. 
Published: June 2007

SummaryTo the articulatio temporomandibularis of the domestic cat (Felis silvestris catus)The mandibular joint of the cat is an incongruent cylindrical joint, which works as a hinge or screw joint. The course of motion is unilateral in the plane of the cutting edge of the molar/premolar border P4/M1 The articular disc is a connective tissue membran: its new function is decreasing the friction.
Renal Anatomy of the Pigmy Hippopotamus (Choeropsis liberiensis): An Overview
Authors: Maluf N. S. R. 
Published: June 2007

SummaryThe adult kidney of Choeropsis liberiensis is 74.8 % cortex and 22.9 % medulla. The neonatal cortex is relatively less. A single kidney has about 3 × 106 glomeruli. These form 5 % of renal mass in the adult but more so in neonates.The primary tubus maximus, TM1, follows the lateral curvature of the kidney. It gives off, toward the hilum, dorso‐ventrally paired secondary tubi maximi, TM2. The tubi are a single layer of high cuboidal epithelium from which terminal collecting ducts arise throughout the surrounding inner medulla. The cranial and caudal limbs of TM1, open at a diminutive pelvis which receives a small papilla in continuity with TM1.The medulla is continuous although variably distorted by folds of cortex at the lateral curvature of the kidney. The renal lobes project toward the medial border and consist of cortex, medulla and TM2. The lobar cortex is continuous with the common cortex of the lateral curvature. The kidney, although strongly lobed, has no infundibula or rencules.A main peripheral vein courses medial and parallel to TM. It is apparently a modified large arcuate vein and receives arcuate and interlobar tributaries. At the level of the papilla it joins the main renal vein.The arterial supply is mainly by interlobar arteries but there are also sizeable external perforator arteries which branch from the main renal artery and perforate the cortex of lobes about the hilum. The sourse of the arteries is illustrated.
Anatomic Observations of the Coronary Sinus in the Dog (Canis familiaris)
Authors: Piffer C. R. , Piffer M. I. S. , Santi F. P. , Dayoub M. C. O. 
Published: June 2007

SummaryThe coronary sinus was investigated in 34 normal adult dogs, in order to verify its formation, tributaries, length and the valves, as well as the relationship of the venous walls to the epicardium and to the myocardium. The valve of the coronary sinus was observed in only 4 cases (1.7 %). In 30 cases (98.3 %) the ostium of the coronary sinus was lacking a valve. The valve of Vieussens double, was found at the level of the transition between the great cardiac vein and the coronary sinus, as well as others parietal venous valves. A comparison with the human pattern was made, particularly regarding the action of the valve of the coronary sinus and the formation of the sinus.
The Thymus of the Guinea Fowl from the Eighteenth Day of Incubation until Maturity
Authors: Onyeanusi B. I. , Onyeanusi J. C. , Emma A. N. , Ezeokoli C. D. 
Published: June 2007

SummaryThe thymus gland of the guinea fowl appeared as a series of pink, irregular‐shaped lobes along the jugular veins. These lobes were 13 in number with seven on the right and six on the left side. The third and sixth lobes on the right side were the largest. The largest lobe measured about 20.0 × 5.0 mm while the smallest measured about 5.0 × 4,0 mm.Histologically, it was encircled by a thin layer of poorly stained connective tissue from which strands penetrated the thymic tissue giving incomplete lobules peripherally as early as day 18 of incubation. Lymphocytes and reticular epithelial cells were the two types of cells occurring at this time. Reticular epithelial cells were observed to be vacuolated especially towards the centre of the gland.Macrophages were observed in the thymus on day 20 of incubation for the first time. The blood vessels had accompanied the interlobular septa into the thymus.By day 21 of incubation, blood vessels had actually penetrated the thymic tissue but most of these vessels were of the capillary size. The cortex also became quite distinct from the medulla.At day 22, vacuolation ceased to appear in the cells at the cortical zone. Macrophages were still less than 10 in the slide.At day 23, most blood vessels were within the medulla and they displayed compressed lumi‐na. Mitotic figures became a common site amongst the large lymphocytes and reticular epithelial cells.By day one post‐hatch, lobulation of the thymus was still poor and macrophages became difficult to identify. The small and medium lymphocytes had outnumbered the large lymphocytes throughout the thymic tissue except at the most peripheral zone of the cortex. Fine vacuoles had reappeared within the cytoplasm of the reticular epithelial cells in the cortex.By day five, the distribution of blood vessels was almost uniform between the cortex and medulla.At three weeks post‐hatch, plasma cells and red blood cells were seen in the stroma of the gland for the first time and most of the red blood cells occurred in the medulla.
Fine Structure of the Pecten Oculi in the American Crow (Corvus brachyrhynchos)
Authors: Braekevelt C. R. 
Published: June 2007

SummaryThe pecten oculi of the American crow (Corvus brachyrhynchos) has been examined by both light and electron microscopy. In this species the pecten is very large and of the pleated type. It consists of 22 ‐ 25 accordion folds that are joined apically by a bridge of tissue which holds the pecten in a fan‐like shape widest at its base. Within each fold are numerous capillaries, larger supply and drainage vessels and many melanocytes. The capillaries are extremely specialized for transport functions and display extensive microfolds on both their luminal and abluminal borders. Except for the nuclear region which contains most of the organelles, the endothelial cell bodies are extremely thin. These capillaries are surrounded by thick fibrillar basal laminae which are conjectured to be structurally important. Pericytes are a common feature of these capillaries. The numerous pleomorphic melanocytes interspersed between the capillaries are also felt to be important in structural support of the pecten. The pecten is considered to be comparable to the falciform process of some teleosts, the conus papillaris of reptiles, the supraretinal vessels of amphibians and teleosts and the intraretinal vessels of mammals which are all felt to be alternative methods of bringing nutrients to the inner retina.