Urea, together with water and other waste substances, forms the urine as it passes through the nephrons and down the renal tubules of the kidney. From the kidneys, urine travels down two thin tubes called ureters to the bladder. The ureters are about 8 to 10 inches long. Muscles in the ureter walls constantly tighten and relax to force urine downward away from the kidneys. If urine is allowed to stand still, or back up, a kidney infection can develop.
SAGITTARIUS (November 23-December 21) LUCKY DAY: Thursday THE per fect woman for a Sagittarian man is a Gemini - which is why Brad Pitt and Angelina Jolie are Hollywood's golden couple. Celebs with stars in their (sex) lives; New PEOPLE astrologer Claire Petulengro takes a look at what 2009 holds for some of the biggest names
1 A Lucky Day (Un dÃ­a de suerte), a 2002 Argentine and Italian film by Sandra Gugliotta. 2  Lucky Day, a 2002 television film based on a story by Mary Higgins Clark.  3 Lucky Day, a song by Sasha from Greatest Hits.  Lucky Day, a fictional character in the 1986 film Â¡Three Amigos!