The microvasculature of the gallbladder in adult Xenopus laevis (Amphibia, Anura): A scanning electron microscope study of vascular corrosion casts and correlative light microscopy

作者：Lametschwandtner A^*; Bartel H; Minnich B; Tholo S; S****itz U

来源：Italian Journal of Zoology, 2011, 78(1): 27-34.

DOI：10.1080/11250003.2010.509137

• Xenopus
• gallbladder
• microvasculature
• corrosion casting
• scanning electron microscopy

Microvasculature, anatomy and histomorphology of the gallbladder of the adult pipid frog, Xenopus laevis (Daudin) were studied by light (LM) and scanning electron microscopy (SEM) of tissue preparations and vascular corrosion casts. The thin wall of the gallbladder consisted of columnar epithelium, lamina propria, a fibromuscular layer, subserosa and serosa. A few diverticula but no epithelial folds were present. Up to five cystic arteries arose from the adjacent right hepatic artery and approached the gallbladder via its neck region. One to two cystic veins departed from the bottom and drained into the nearby abdominal vein. Cystic arteries were of the pinnate-type and embraced the gallbladder with their branches. Terminal arterioles gave rise to wide subepithelial capillaries. Transition distances from arteries to veins were short. In general, three to four layers of blood vessels built the vascular bed of the gallbladder wall. The wide subepithelial capillaries established an interface well adapted (1) to allow capillary circulation over a wide range of filling states of the gallbladder and (2) to serve the exchange processes taking place between stored bile and the blood vascular system via the microvillous columnar epithelium.

• 出版日期2011