Sealing the ducts

Sealing the ducts

The transitional epithelium lining the ducts of various glands such as salivary and mammary glands, and organs such as liver, pancreas, kidney and lung must bear a permeability barrier as they are in direct contact with the hostile environment in the lumen. The barrier function of pancreatic ductal epithelium is essential for preventing the back flux of proteases, lipases and DNAases from the p...

Structural Design and Sealing Performance Analysis of Biomimetic Sealing Ring

In order to reduce the failure probability of rubber sealing rings in reciprocating dynamic seal, a new structure of sealing ring based on bionics was designed. The biomimetic ring has three concave ridges and convex bulges on each side which are very similar to earthworms. Bulges were circularly designed and sealing performances of the biomimetic ring in both static seal and dynamic seal were ...

Cancers of the gallbladder and biliary ducts.

Neoplasms of the biliary tract tree are uncommon and have a poor overall prognosis. Although numerous risk factors have been identified, little is known about the pathogenesis of these tumors, and no effective screening technique is available for early detection. Surgery remains the principal treatment modality and the only potential cure, with laparoscopy playing an increasingly important role...

Congenital atresia of the bile ducts.

The Study of Nephridia and Genital Ducts

CONTENTS. ARTHROPOD A, p. 303. Pe r ipa t iodea , with Segmental Coelomoducts mostly excretory, p. 305. Crustacea, possibly with remnants of Nephridia, p. 308. Summary, p. 317. Arachnida , p. 318. Chilopoda, Chi lognatha , Symphyla , Insec ta Hexapoda, p. 320. General summary for Arthropoda, p. 322. MOLLUSCA, p. 324. Larval Protonephridia and Adult Coelomic Kidneys and Genital Ducts, p. 325. Re...