title: The seminal vesicle of the African catfish, Clarias gariepinus. A histological, histochemical, enzyme-histochemical, ultrastructural and physiological study.
abstract: The seminal vesicle of the African catfish, Clarias gariepinus, consists of 36-44 fingerlike lobes built up of tubules in which a fluid is secreted containing acid polysaccharides, acid-, neutral- and basic proteins, and phospholipids. In this fluid sperm cells are stored. The seminal vesicle fluid immobilizes the sperm cells. After ejaculation, it prolongs the period of sperm activity. The seminal vesicle fluid is secreted by the epithelium lining the tubules. The tubules in the proximal part of the lobes are predominantly lined by a simple cylindrical and those of the distal part by a simple squamous epithelium. These epithelial cells contain enzymes involved in energy-liberating processes, the enzyme activities being proportional to the height of the cells. Interstitial cells between the tubules have enzyme-histochemical and ultrastructural features indicative of steroid biosynthesis. Similar characteristics are found in testicular interstitial cells. The most rostral seminal vesicle lobes and the most caudal testicular efferent tubules form a network of tubules that opens at the point where the paired parts of the sperm ducts fuse with each other. The tubules of most seminal vesicle lobes, however, form a complex system that fuses with the unpaired part of the sperm duct.
authors.forename: R
authors.initials: R
authors.lastname: van den Hurk
authors.forename: J W
authors.initials: JW
authors.lastname: Resink
authors.forename: J
authors.initials: J
authors.lastname: Peute
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism; D000818:Animals; D002397:Catfishes; D005954:Glucosephosphate Dehydrogenase / Q000378:metabolism; D006651:Histocytochemistry; D006913:Hydroxysteroid Dehydrogenases / Q000378:metabolism; D008291:Malate Dehydrogenase / Q000378:metabolism; D008297:Male; D008854:Microscopy, Electron; D012669:Seminal Vesicles / Q000166:cytology* / Q000201:enzymology / Q000648:ultrastructure; D014533:Uridine Diphosphate Glucose Dehydrogenase / Q000378:metabolism
chemical_list: D006913:Hydroxysteroid Dehydrogenases; D014533:Uridine Diphosphate Glucose Dehydrogenase; D008291:Malate Dehydrogenase; D005954:Glucosephosphate Dehydrogenase; D000135:Acid Phosphatase