The Urinary System :: science

The Urinary SystemHow do the urinay system stool Your body takes nutrients from food and uses them to maintain all bodily functions including energy and self-repair. later on your body has taken what it needs from the food, waste products atomic number 18 left so-and-so in the blood and in the bowel. The urinary system works with the lungs, skin, and intestines--all of which excessively excrete wastes--to keep the chemicals and water in your body balanced. Adults eliminate about(predicate) a quart and a half of urine each day. The meter depends on many factors, especially the amounts of bland and food a individual consumes and how much fluid is lost finished with(predicate) sweat and breathing. Certain types of medications cannister also affect the amount of urine eliminated.The urinary system removes a type of waste called urea from your blood. Urea is produced when foods containing protein, such as meat, poultry, and plastered vegetables, argon broken down in the body. Urea is carried in the bloodstream to the kidneys.The kidneys are bean-shaped organs about the size of your fists. They are near the in-between of the back, just below the rib cage. The kidneys remove urea from the blood through tiny filtering units called nephrons. Each nephron consists of a ball formed of bitty blood capillaries, called a glomerulus, and a small tube called a nephritic tubule. 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 (200 to 250 mm) long. Muscles in the ureter walls constantly tighten and unstrain to force urine downward away from the kidneys. If urine is allowed to stand still, or back up, a kidney infection can develop. Small amounts of urine are emptied into the bladder from the ureters about every 10 to 15 seconds.The bladder is a holl ow muscular organ shaped like a balloon. It sits in your pelvis and is held in place by ligaments attached to other organs and the pelvic bones. The bladder stores urine until you are ready to go to the basin to empty it. It swells into a round shape when it is full and gets smaller when empty. If the urinary system is healthy, the bladder can hold up to 16 fluid ounces (500 ml) of urine comfortably for 2 to 5 hours.