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
In 1998, the name of the holiday was changed from Secretariesâ Day to Administrative Professionalsâ day to better represent the full range of clerical positions. In the United States, the day is often celebrated by giving one's secretary flowers, candy, or small gifts, or by taking him or her out to lunch. The day is observed on the third or fourth Wednesday of April (i.e. April 25, 2007; April 23, 2008). National Professional Secretaries Week and National Secretaries' Day was created in 1952 through the work of Harry F. Klemfuss of Young and Rubicam.