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
Get the First/Last Day of a Week, Month, Quarter or Year in PHP. If youâve ever needed to find the first or last day of a given period and youâre rocking a PHP version greater than or equal to 5.2, today is your lucky day! Both of these functions return a DateTime object, so you can output the date in any format available to the PHP date() function. Get the First Day of a Week, Month, Quarter or Year.