.What is the urinary tract?
It deals with the production and elimination of urine ; it is formed by the kidneys, ureters, bladder and urethra.t is the set of organs and structures that are responsible for the production and elimination of urine. .
The kidney mainly produces urine . The kidneys are two and are positioned on the sides of the vertebral column, between the eleventh thoracic vertebra and the second-third lumbar. The right kidney is located below the liver , the left kidney behind the spleen (the two areas in which they are found are known as “lumbar pits”). About 12 cm long , they are characterized by a shape very similar to a bean ; their weight is approximately 110-130 grams each.
It is the conduit that allows urine to pass from the kidneys to the urinary bladder . Present in each of the kidneys, it is a muscle-mucous duct that can ideally be divided into an abdominal and a pelvic portion.
They are arranged – vertically – on the sides of the spine. Their diameter measures about one centimeter, while the length is about 25-30 cm. They are lined internally by a mucous wall that comes into contact with urine; this wall is – in turn – covered by a muscular tunic which, by contracting, causes the expulsion of urine into the bladder . Each ureter has at its lower end, i.e. in the outlet area in the bladder wall, a valve that allows urine to pour into the bladder, but which prevents it from going backwards, thus avoiding reflux to the kidneys.
It is the canal that connects the bladder with the urethral orifice (meatus) . It is characterized by different functions and morphologies in the two sexes: if, in fact, in women, its only function is to allow the expulsion of urine outside the body, in men it is instead assigned – in addition to the transport of the urine outwards – even when transporting semen . The average diameter of this conduit is approximately 10 millimeters, in both sexes; the length, however, varies significantly between men and women.
The urinary bladder
The urinary bladder – shaped like a sphere – collects urine produced by the kidneys. It receives the ureters (i.e. the two ducts that transport urine from the kidneys to the bladder) and expels the urine through the urethra. It is placed differently in women and men: in the female organism it is located in front of the uterus , under the peritoneum , while in the male organism it is placed above the prostate and anterior to the rectum .
What is the urinary tract used for?
Its function is to allow the production and elimination of urine .