Ausência da Ansa proximalis do cólon em animal azebuado

The absence of the ansa proximalis of the colon in a zebufoetus has been reported.O artigo apresenta resumo em inglês

Contribuição ao estudo da irrigação arterial do nó sinu-atrial, em búfalos (Bubalus bubalis — Linnaeus, 1758) da raça jaffarabadi.

L ’irrigation arterielle du noeud sinusal a été studiée sur 75 coeurs de buffles de la race Jaffarabadi (Bubalus bubalis), 52 adultes (35 femelles et 17 mâles) et 23 foetus à terme (16 mâles et 7 femelles). L ’auteur ont observé que l’irrigation sanguine du noeud sinusal dépend exclusivement de collatérales du ramus circumflexus de l’a. coronaria dextra, 44 fois (58,7% ± 5,7) ou du ramus circumflexus dexter, 15 fois (20,0% ± 4,6) grâce, 50 fois (66,7% ± 5,4) en partie, au ramus proximalis atril dextri et en autre partis: au ramus intermedius atrii dextri 31 fois (41,3% ±  5,7) et au ramus distalis atrii dextri, 19 fois (25,3% ± 5,0) . Vans les autres 9 cas (12,0% ± 3,8), la région occupée par le noeud sinusal reçoit seulement le ramus proximalis atrii dextri, 7 fois (9,3% ± 3,4) ou  simplement le ramus distalis atrii dextri, 2 fois (2,7% ± 1,9). Sur 15 coeurs (20,0% ± 4,6), la région où se localise le tissu nodal est servie simultanément par des collatérales de l'a. coronaria sinistra et du ramus circumfléxus de ï a. coronaria dexter, 11 fois (14,7% ± 4,1) ou du ramus circumflexus dexter, 4 fois (5,3% ± 2 ,5 ), c’est-à-dire, par le ramus proximalis atrii sinistri associé: au ramus intermedius atrii dextri, 7 fois (9,3% ± 3,4), au ramus distalis atrii dextri, 7 fois (9,3% ± 3,4) et au ramus proximalis atrii dextri, 1 fois (1,3 ± 1 ,3% ). Sur un seul cas, 1 fois (1,3% ± 1,3) c’est le ramus proximalis atrii sinistri, originaire de l’a. coronaria sinistra, qui nourrit seul, la région occupés par le noeud sinusal.Anastomoses furent observées 269 fois, entre collatérales des artères impliquées dans l’irrigation du noeud sinusal. Les différences observées, relatives au sexe, quant à la participation exclusive de collatérales du ramus circumflexus de l ’a. coronaria dextra ou du ramus circumflexus dexter à l'irrigation du noeud sinusal, ainsi que de vaisseaux originaires seulement de l'a. coronaria sinistra, ou, encore, dans les cas où les deux interviennent, furent attribuées au hasard, pour n’avoir pas présenté de signification statistique.The arterial blood supply of the sinus node has been studied in 75 hearts of buffaloes (Bubalus bubalis) obtained from 52 adults (35 females and 17 males) and 23 foetuses (16 males and 7 females). The A. observed that the sinus node area was nourished exclusively by the ramus circumflexus of the a. coronaria dextra in 44 cases (58-7 ±5.7) find in 15 cases (20.0% ±4.6) by collaterals of the ramus circumflexus dexter. After a more detailed, studied it was shown that the sinus node was nourished in 50 hearts (66.7% ±5.4) by the ramus proximalis atrii dextri associated 31 times (41,3% ±5. 7) to the ramus intermedius atrii dextri and 19 times (25.3% ± 5.0) to the ramus distalis atrii dextri. From the remaining 9 hearts ( 12.0 ± 3.8) in 7 cases (9.3% ± 3 .4 ) the sinus node received exclusively the ramus proximalis atrii dextri and in 2 cases (2.7% ± 1 .9 ) the ramus distalis atrii dextri. In 15 of the hearts examined (20.0% ± 1/.6) the sinus node receives collaterals of the a. coronaria sinistra associated 11 times (V, .1% ± l , . l ) to collaterals of the ramus circumflexus of the a. coronaria dextra and 4 times (5.3 ± 2 .5 ) to collaterals of the ramus circumflexus dexter, i.e . the ramus proximalis atrii sinistri associated to the ramus intermedius atrii dextri, 7 times (9.3%, ±3.1/) and to the ramus proximalis atrii dextri, in only one case (1.3% ± 1.3). In one of the heart examined' (1.3% ± 1.3) the ramus proximalis atrii sinistri from the a. coronaria sinistra was distributed in the above mentioned area. Anastomosis were observed 269 times between colleterals from the arteries that nourished the sinus node area. There was no sexual influence in the pattern of the blood supply to the sinus node.A irrigação arterial do nó sinu-atrial foi estudada em 7.5 corações de búfalos da raça Jaffarabadi (Bubalus bubalis), 52 adultos (35 fêmeas e 17 machos) e 23 fetos de termo (16 machos e 7 fêmeas). O Autor observou que a irrigação arterial do território do nó sinu-atrial fica, exclusivamente, na dependência de colaterais do ramus circumflexus da a. coronária dextra, 44 vezes (58,7% ±5,7) ou do ramus circumflexus dexter, 15 vezes (20,0% ±4,6) graças, 50 vezes (66,7% ± 5,4), de uma parte ao ramus proximalis atrii dextri e de outra: ao ramus intermedius atrii dextri, 31 vezes (41,3% ± 5,7) e ao ramus distalis atrii dextri, 19 vezes (25,3% ± 5,0). Nos outros 9 casos ( 12,0% ±3,8), o citado território recebe apenas o ramus proximalis atrii dextri, 7 vezes (9,3% ±3,4) ou somente o ramus distalis atrii dextri, 2 vezes (2,7 ± 1,9). Em 15 corações (20,0% ± 4,6), a área. onde se localiza o tecido nodal é servida simultaneamente por colaterais da a. coronária sinistra e do ramus circumflexus da a. coronária dextra, 11 vezes (14,7% ± 4,1) ou do ramus circumflexus dexter, 4, vezes (5,3% ± 2,5), isto é, pelo ramus proximalis atrii sinistri associado: ao ramus intermedius atrii dextri, 7 vezes (9,3 ± 3,4), ao ramus distalis atrii dextri, 7 vezes (9,3% ± 3,4) e ao ramus proximalis atrii dextri, 1 vez (1,3% ± 4,3). Em apenas um caso, 1 vez (1,3% ± 1,3), cabe ao ramus proximalis atrii sinistri, oriundo da a. coronária sinistra, nutrir sozinho a região ocupada pelo nó sinu-atrial. Anastomoses foram registrar 269 vezes entre colaterais das artérias responsáveis pela irrigação do nó sinu-atrial. As diferenças encontradas, relativamente aos sexos, quanto à participação exclusiva de colaterais do ramus circumflexus da a. coronária dextra ou do ramus circumflexus dexter na irrigação do nó sinu-atrial, assim como de vasos oriundos apenas da a. coronária sinistra, ou, ainda, nos casos em que ambos intervêm, foram atribuídas ao acaso, por não se apresentarem estatisticamente significantes

Contribution to the study of the blood supply of the sinus node in zebu cattle

O artigo apresenta resumo em inglês.The arterial blood supply of the sinus node has been studied in 100 zebu cattle (87 males and 13 females). In 75 hearts (75.0% ± 4.3) the sinus node is nourished through collaterals of both the a. coronaria dextra and the a coronaria sinistra: in 73 hearts (73.0% ± 4.4) from the ramus proximalis atrii sinistri plus, in 48 cases (48.0% ± 5.0) the ramus intermedins atrii dextri, in 5 cases (5.0% ± 2.2) the ramus proximalis atrii dextri, in 3 cases (3.0% ± 1.7) the ramus distalis atrii dextri, in 13 cases (13.0% ± 3.4) the ramus proximalis atrii dextri plus the ramus intermedins atrii dextri and in 4 cases (4.0% ± 2.0) the ramus intermedins atrii dextri plus one collateral from the ramus ventricularis dexter. In the remaining 2 cases (2.0% ± 1.4) the arterial blood supply to the sinus node is through the ramus proximalis atrii dextri, plus one collateral from the ramus ventricularis dexter, in 1 case (1.0% ± 1.0), and by that collateral plus the ramus intermedins atrii dextri, in 1 case (1.0% ± 1.0). In 19 hearts (19.0% ± 3.9) the sinus node is nourished exclusively by collaterals of the a. coronaria dextra: in 2 cases (2.0% ± 1.4) only by the ramus proximalis atrii dextri, in 17 cases  (17.0% ± 3.8) from the ramus proximalis atrii dextri plus, in 13 cases (13.0% ± 3.4) the ramus intermedins atrii dextri, in 3 cases (3.0% ± 1.7) the ramus distalis atrii dextri and in 1 case (1.0% ± 1.0) the ramus intermedius atrii dextri plus the ramus distalis atrii dextri. In 6 remaining hearts (6.0% ± 2.4) the sinus node is nourished exclusively by collaterals of the a. coronaria sinistra; in 3 cases (3.0% ± 1.7) only by the ramus proximalis atrii sinistri and in 3 cases (3.0% ± 1.7) by that branch and one collateral from the ramus ventricularis dexter. Arterial anastomosis were observed in 37 cases (37.0% ± 4.8) between collaterals from rami proximalis atrii sinistri and proximalis atrii dextri, in 19 cases (19.0% ± 3.9) between collaterals from the rami proximalis atrii sinistri and intermedius atrii sinistri, in 9 cases (9.0% ± 2.9) between one collateral from the ramus ventricularis dexter, that is directed to the sulcus terminalis and vessels originated from the ramus circumflexus dexter, in 8 cases (8.0% ± 2.7) between collaterals from the ramus proximalis atrii sinistri, in 7 cases (7.0% ± 2.6) between collaterals from the ramus proximalis atrii dextri and from the a. coronaria sinistra, in 6 cases (6.0% ± 2.4) between collaterals from the ramus proximalis atrii dextri and, in 3 cases (3.0% ± 1.7) between collaterals from the rami proximalis atrii dextri and intermedius atrii sinistri. There was no sexual influence in the pattern of the blood supply to the sinus node

Blood supply of the sinus node in the chimpanzee

The A. studied the arterial irrigation of the sinus node in the heart of one eight years old female chimpanzee (Pantroglodytes paniscus) : the nodal artery arose directly from the aorta and it was identified as the ramus proximalis atrii dextri.O artigo apresenta resumo em inglês

Ramificação das aa. celíaca cranial no gato (felis catus domestica)

The arterial branches with emerge from the celiac and cranial mesenteric arteries were studied in 25 male and 25 female outbreed young and adult cats. The hepatic artery was found to be the first and most frequent (90.0%± 4.2) colateral of the celiac artery followed by the gastrolienal branche composed by both the left gastric and the lienal artery. In only (8,0% ± 3,8) of the cases both the hepatic and left gastric artery was found to originate in a common branch. In only one animal (2.0% ± 2.0) the tripus coeliacus was observed. In 28 of the studied animals (56.0% ± 7.0) the caudal pancreatico duodenal artery was seen to emerge, as the first colateral, from the cranial mesenteric artery, followed by the medial colic artery wich in 4 % of the cases emerged making a common branch with the ileocecocolic artery. In 17 times (34-0% ± 6.7) the medial colic artery appeared ahead from, and in the remaining 5 animals (10.0% ± 4-2) at the same area of the emergency of the pancreatico duodenal artery. In all the cases, excepting the two above observations already mentioned, the ileocecocolic artery and branches of the jejunal arteries, emerge after both the pancreatico duodenal artery and medial colic artery. Some vessels were observed emerging from the celiac artery. It was also found some variability related to the origin of the first and second jejunal branches.Estudando a ramificação das aa. celíaca e mesentérica cranial em 50 gatos, 25 machos e 25 fêmeas, jovens e adultos, de raça não definida verificou-se que mais frequentemente, 45 vezes (90,0% ± 4,2) da artéria celíaca nasce como primeiro colateral a artéria hepática, aparecendo depois do troncogastrolienal que cede as aa. gástrica esquerda e lienal. Apenas 4 vezes (8,0% ± 3,8) acharam as artérias hepática e gástrica esquerda originando-se por tronco comum, enquanto o tripus coelicus foi identificado somente 1 vez (2,0% ± 2,0). Da artéria mesentérica cranial observou-se que, comumente, 28 vezes (56% ± 7,0), parte como primeiro colateral a a. pancreática duodenal caudal, surgindo depois a a. cólica média vista a nascer 2 vezes (4,0% ± 2,7) em tronco com a a. ileocecocolica. Nas outras preparações a a. cólica média foi notada 17 vezes (34,0% ± 6,7) individualizando-se antes e 5 vezes (10,0% ± 4,2) à mesma altura da a. pancreático duodenal caudal. Exceção feita aos dois casos já descritos, encontraram sempre, as aa. Ileocecocolica e tronco das jejunais nascendo após as emergências das aa. Pancreático duedenal caudal e cólica média. Os AA. registraram também, a presença de outros vasos de pequeno calibre partindo da a. celíaca e algumas variações relacionadas à origem dos dois primeiros ramos jejunais

Aspectos morfológicos do funículo espermático de jumentos (Equus asinus -- Linnaeus, 1758) da raça Pêga

We have studied morphologic aspects of 38 pairs of spermatic cord in Pêga donkey, and histologically observed that their components are involved for a slim capsule of dense connective tissue. Bellow this capsule we find internal cremaster muscle that shows distinct layer or arises septate by dense connective tissue invasion. Funicular capsule and muscular tissue form disordered plicae and also some expansions that sometimes are followed for intervascular loose connective tissue. Involving funicular arteries and veins, we identified loose connective tissue with elastic and reticular fibbers, with arteriolae, venulae, nerves and lymphatic. Testicular artery studied has sinuous course, internal tunica formed by endothelium and connective tissue, with outstanding internal elastic limiting lamina. Tunica media shows to be formed for smooth musculature, supported by a rich and orderly net of reticular fibbers and few elastic fibbers, while external tunica, constituted of dense connective tissue, with collagenous and elastic fibbers, has continuity with intervascular loose connective tissue. Testicular veins, involving testicular artery, to form venous pampiniform plexus and show variable caliber, a developed tunica media, constituted of smooth muscular fibbers supported by a irregular net of reticular fibbers and few elastic fibbers. Testicular arteries segments of spermatic cord have mean, maximum and minimum lengths, respectively, of 71.34 cm, 108.9 cm and 41.6 cm at the right, and 68.78 cm, 110.4 cm and 41.6 cm at the left, and do not have statiscally significant differences, at level of 5%. Spermatic cord has a conical shape, latero-laterally flattened, with basis settled over orchis epididymal edge.Estudando aspectos morfológicos de 38 pares de funículos espermáticos de jumentos da raça Pêga, observamos histologicamente que seus componentes encontram-se envolvidos por delgada cápsula de tecido conjuntivo denso, revestido pelo mesotélio, sob a qual se encontra o músculo cremáster interno, apresentando camadas distintas ou septado por tecido conjuntivo denso. Cápsula funicular e tecido muscular formam inúmeras pregas e algumas expansões, por vezes acompanhadas pelo tecido conjuntivo frouxo intervascular. Envolvendo a artéria e as veias funiculares, identificamos tecido conjuntivo frouxo rico em fibras elásticas e reticulares, com arteríolas, vênulas, nervos e linfáticos. O segmento da artéria testicular estudado possui trajeto sinuoso, túnica interna formada pelo endotélio e tecido conjuntivo, com destacada lâmina limitante elástica interna. A túnica média é formada por espessa camada de musculatura lisa, sustentada por rica e ordenada rede de fibras reticulares e escassas fibras elásticas, e a túnica externa, constituída por tecido conjuntivo denso, contendo fibras colágenas e elásticas, apresenta continuidade com tecido conjuntivo frouxo intervascular. Veias testiculares que envolvem a artéria testicular para formar o plexo venoso pampiniforme mostram calibre variável, túnica média desenvolvida, constituída por fibras musculares lisas, sustentadas por irregular rede de fibras reticulares e poucas fibras elásticas. Os segmentos das artérias testiculares dos funículos espermáticos possuem como comprimento médio, máximo e mínimo, respectivamente, 71,34 , 108,9 e 41,6 cm à direita e 68,78, 110,4 e 41,6 cm à esquerda, não apresentando diferenças estatisticamente significantes ao nível de 5%. O funículo espermático possui forma cônica, achatado látero-lateralmente, com base assentada sobre a margem epididimária do testículo

Estudo topográfico e histológico do nó sinu-atrial em bovinos azebuados

The authors studied by histological methods the topographic and the microscopic morphology of the sinus node in zebu cattle. This structure is located at the sulcus terminalis, without ramifications. The morphological characteristics of the specialized cells of the node, as well as the different type of fibers that compose the vascular conjunctive stroma are stressed. Glycogen is abundant in the cytoplasm of the specialized cells of the node.O artigo apresenta resumo em inglês

Contribuição ao estudo dos colaterais calibrosos do arco aórtico no gato

The AA. studied the conspicuos collaterals of the aortic arch with special reference the frequency of the truncus bicaroticus in 240 cats (111 males and 129 females). In 165 cases (68.7% ± 3.0) the right common carotid artery and right subclavian artery arise from a single trunk of the a. braquiocefalica. The truncus bicaroticus was present in 75 cases (31.3% ± 3.0). Sex and age seem not to influence in the arrangement of the conspicuos collaterals of the aortic arch.O artigo apresenta resumo em inglês

Arranjo da ansa spiralis em fetos de caprinos

The regular patterns of the ansa spiralis of the colon have been examined in a group (77) of goat foetuses. The same frequency distribution was found as compared with that from a large number (946) of post-natal animals analysed in a previous investigation (Paiva e Borelli, 1963/64). It can be concluded that age did not influence the arrangement of the coils. Nine specimens were seen with irregular spirals.O artigo apresenta resumo em inglês

Estudo topográfico e histológico do nó sinu-atrial em asininos

The AA. studied the topographic and the microscopic morphology of the sinus node in the ass by histological methods. This structure is located at the superior third of the “sulcus terminalis", dihedron caval-atrial angle and the left side of the junction of the cranial caval vein with the right atrium. The morphological characteristics of the specialized cells of the node, as well as the different types of fibers that compose the vascular conjunctive stroma are stressed. Glycogen is abundant in the cytoplasm of the specialized cells of the node.O artigo apresenta resumo em inglês