title: [Ecological significance of the dilation of the distal portion of the uterus of some trematodes].
abstract: Many trematodes parasitic in the oral cavity, pharynx or oesophagus of snakes and birds or in the cloaca of birds possess a sac-shaped dilation of the uterine distal portion or the organ itself is sac-shaped. Trematodes possessing such uterus lay periodically more or less portions of eggs. The time of egg laying depends on the frequency of some functions of the host's organs (food capture by the host, swallowing the food, defecation), which the trematodes inhabit.
mesh_terms: D000818:Animals; D001717:Birds / Q000469:parasitology; D002988:Cloaca / Q000469:parasitology; D004947:Esophagus / Q000469:parasitology; D005260:Female; D009055:Mouth / Q000469:parasitology; D010063:Ovum; D010614:Pharynx / Q000469:parasitology; D012911:Snakes / Q000469:parasitology; D014200:Trematoda / Q000033:anatomy & histology*; D014599:Uterus / Q000033:anatomy & histology*
vernacular_title: Ekologicheskoe znachenie rasshireniia distal'nogo uchastka matki nekotorykh trematod