Testicular microvascularization in the common tree shrew (Tupaia glis) as revealed by vascular corrosion cast/SEM and by TEM

Pradidarcheep, Wisuit; Kongstaponkit, S.; Waraklang, P.; Chunhabundit, Panjit; Somana, Reon

doi:10.1002/(sici)1097-0029(19980801)42:3<226::aid-jemt7>3.0.co;2-q

Cited by 5 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This hypothesis was suggested by the studies of Noordhuizen‐Stassen et al (1985), which showed higher oxygen saturation of the blood in the proximal than the distal pampiniform plexus vessels. Arteriovenous anastomoses in the spermatic cord were found in other mammals, such as humans (Ergun et al, 1997; Skowronski and Jedrzejewski, 2003), boars (Rerkamnuaychoke et al, 1991a), rats (Ohtsuka, 1984), and tree shrews (Rerkamnuaychoke et al, 1991b; Pradidararcheep et al, 1998) which suggested a relatively common function of these structures in animals.…”

Section: Discussionmentioning

confidence: 97%

“…Therefore, further investigations should elucidate whether described anastomoses are more likely to perform the role of pressure regulators or metabolic shunt pathways. In the common tree shrew ( Tupaia glis ), some of the small branches of the convoluted part of the testicular artery gave rise to vasa vasorum, supplying the wall of the pampiniform plexus, especially in their distal portion (Pradidararcheep et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Angioarchitecture of the bovine spermatic cord

Polguj

Jędrzejewski

Topol

2011

Journal of Morphology

View full text Add to dashboard Cite

We described the topography and morphometry of the testicular artery, pampiniform plexus veins, and indirect connections between them in the spermatic cord of the bull. Sixty microcorrosive casts of bovine spermatic cords were analyzed macroscopically, by stereomicroscopy, and by scanning electron microscopy. The average size of the testicles was 94.6 × 49.7 × 54.7 mm. The testicular artery formed a superiorly pointed cone-like structure with its base fixed to the proximal part of the gonad. The artery gave off one or two branches to the head of epididymis and to the deferens duct. The pampiniform plexus originated from intra-tunical veins. Veins of the pampiniform plexus were of smaller diameter but larger number than intra-tunical ones. The density of the veins of the pampiniform plexus was 9.37 ± 1.07 mm(-2) . The testicular vein began 90-121 mm above the superior pole of the testis. In 2.9% of specimens, the testicular vein was doubled. Numerous anastomoses among veins of pampiniform plexus were observed. Additionally, indirect anastomoses between the testicular artery and pampiniform plexus veins formed by the capillary network of the vasa vasorum of the testicular artery were visualized by scanning electron microscopy. In all cases, narrowings in the casts of the precapillary vessel were observed. We also documented the vasa vasorum of the testicular artery in bulls. The density of these vessels was 22.87 ± 11.48 mm(-2) . The indirect arteriovenous connections together with the presence of circular constrictions of the lumen in precapillary vessels may play a role in testicular blood flow regulation.

show abstract

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Angioarchitecture of the bovine spermatic cord

Polguj

Jędrzejewski

Topol

2011

Journal of Morphology

View full text Add to dashboard Cite

show abstract

“…It then courses caudally along the medial border, then rostrally along the lateral border, and penetrates into the parenchyma near the rostral pole. While curving on the lateral border of the testis, it gives off 4–5 parenchymal branches penetrating perpendicularly into the testicular tissue [ 9 ].…”

Section: Discussionmentioning

confidence: 99%

“…There are several hypotheses concerning the physiological role of the winding and straight segments of the intra-testicular arteries, as well as the arterial conglomerations inside the mediastinum of the bovine testis [ 9 , 17 , 18 , 20 ]. However, the absence of these structures in the human testis prompts speculation.…”

Section: Discussionmentioning

confidence: 99%

Morphological variations of intra-testicular arterial vasculature in bovine testis - a corrosion casting study

et al. 2015

View full text Add to dashboard Cite

BackgroundProper blood supply is necessary for the physiological function of every internal organ. The article offers the first classification of the bovine intra-testicular arteries. A corrosive study focused on the intra-testicular arterial vasculature was performed on 40 bovine testes. The vessels were analyzed accurately using MultiScanBase v.18.02 software.MethodsA corrosive study focused on the intra-testicular arteries was performed on 40 bovine testes. The vessels were analyzed accurately using MultiScanBase v.18.02 software.ResultIn bulls, the centripetal arteries tended to run straight to the mediastinal region, where they form knot-like vascular structures. Those structures are the origin for centrifugal recurrent branches, running peripherally. However, three basic types of intra-testicular arterial vasculature were noted. Type I had centrifugal, recurrent branches, running peripherally towards the surface of the testis but did not reach the tunica albuginea. Type II exhibited centrifugal, recurrent branches running more horizontally than type I. Type III is the most heterogeneous type, composed of other variform types of arteries not classified as type I or type II. Type II was most commonly observed as a vascular conglomerate of intra-testicular arteries within the arterial network of the mediastinum testis. In type III, artery diameter was significantly smaller than observed in types I and II (p < 0.01). Types I and II did not differ between each other regarding artery diameter (p > 0.05).ConclusionVariations of the intra-testicular arterial vasculature in bovine testis may suggest that particular types of vessels play different physiological roles. The most common type of intra-testicular artery comprising the arterial network of the mediastinum testis was type II.

show abstract

“…Studies have shown that the special structure of the plexiform venous plexus formed in the spermatic cord of the mammalian testis closely surrounds the tortuosity of the testicular artery and is related to functions such as hormone transport (Henderson & Daniel, 1987), Free and other studies suggested that 28% to 46% of the testicular arterial blood flow in the sheep spermatic cord directly enters the piliform venous plexus through the arteriovenous anastomosis, but the arteriovenous anastomosis and nourishment of the spermatic cord have not been observed. The existence of arteries, some studies believe that such a structure is on the one hand to improve the regulation mechanism of the blood flow temperature of the plexiform venous plexus when it returns to the body; on the other hand, the ligamentous veins can be lost from their accompanying arteries by absorption The heat in the blood lowers the temperature of the bloodstream before entering the testis; and the exchange of temperature may not be direct heat exchange only between the testicular artery and the plexiform plexus, but also between the feeding vessels and the plexiform plexus (Pradidarcheep et al, 1998).…”

Section: Correlation Between the Characteristics Of Testicular Artery...mentioning

confidence: 99%

Comparison study of morphology and vascular casts between plateau‐type Tibetan sheep and low‐altitude small‐tailed Han sheep testes

Liu

Yang

et al. 2022

Anat Histol Embryol

View full text Add to dashboard Cite

We compared the differences in testicular morphology and vascular anatomy between plateau‐type Tibetan sheep and low‐altitude Small‐tailed Han sheep to explore any adaptations of Tibetan sheep to high altitudes and hypoxia factors. Testicular artery architecture specimens of plateau‐type Tibetan sheep and lowland Small‐tailed Han sheep were used to compare the physical parameters of the testis, testicular artery architecture, arterial diameter, testicular leaflets and the characteristics of epididymal head arterioles. The results showed that the weight, major axis, minor axis, overall length, caput major axis and caput minor axis in Tibetan sheep were larger than those of Small‐tailed Han sheep; however, the caput major axis of epididymal head in Tibetan sheep was smaller than that of Small‐tailed Han sheep. Compared with Small‐tailed Han sheep, the testicular knot‐like arteries of Tibetan sheep had denser spiral distribution and more small arteries, and the diameters of centripetal arteries, knot‐like arteries, centrifugal arteries and epididymal microarterioles were also thicker. The ‘spindle’ indentation on the surface of the microarteriole of the head of the testicular leaflets and the epididymis in plateau Tibetan sheep was relatively shallow. The results showed that the physical testicular characteristics, testicular artery construction and arteriole surface structure of Tibetan sheep were adapted for the plateau environment.

show abstract

Testicular microvascularization in the common tree shrew (Tupaia glis) as revealed by vascular corrosion cast/SEM and by TEM

Cited by 5 publications

References 34 publications

Angioarchitecture of the bovine spermatic cord

Angioarchitecture of the bovine spermatic cord

Morphological variations of intra-testicular arterial vasculature in bovine testis - a corrosion casting study

Comparison study of morphology and vascular casts between plateau‐type Tibetan sheep and low‐altitude small‐tailed Han sheep testes

Contact Info

Product

Resources

About