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
Sagittarius seem to be guided by luck, good things happen to Sagittarius and this is usually because of their optimistic outlook and positive disposition which attracts good fortune. Despite hardships, Sagittarius is always optimistic that good things will happen tomorrow and the future carries good luck.he has a great attitude and always seems to be on the go. Sagittarius woman is for the man with lots of energy and creativity. She likes unconventionality and change, so whisk her away last second to somewhere unplanned and uncharted and she will remember you forever.