Pediatric rheumatologists are doctors who specialize in providing comprehensive care for children (and their families) who have rheumatic diseases, especially arthritis. The bacteria is present to the bladder,urethra and kidney. When the bacteria gets contact with the urine, it multiply inside it and accross its rejection with urine out of body, it contaminates the urinary tract and causes what it is named the urinary tract infectio(UTI) and symptomised by an urge to urinate and a sensation of burning over the urination and subsequently with intermittent passing small burned numbers of urine. There are three main subclasses of gastropods; the Prosobranchia (ocean snails), Opisthobranchia (sea slugs, sea butterflies and sea hares), and Pulmonata (land and freshwater snails and slugs). Each of the subclasses has evolved in their own way and members differ in their reproduction and life cycles within the subclasses. The gastropod folks are so large it really is impossible to spell out living cycle of each one individual species, but a majority of general rules do apply. The more evolved the species, the more complex their reproductive cycle in addition to their biology. Here we will look at the life span cycle of a gastropod through various examples and how they differ with regards to the type. How an erection takes place.