URINARY SYSTEM ANATOMY
Urine is a fluid consisting of waste-products picked out of circulating blood. This is done by the two glands known as kidneys situated on both sides of the loins, where the ribs end. A kidney is bean-shaped and has a capsule. From it descends a pipe, one on each side, called ureter which conducts the urine as soon as it is formed inside the kidney, into the urinary reservoir called Urinary Bladder. If a kidney is cut, its outer part is seen to be granular and its inner, made up of striations, pyramid like in arrangement.
It is these latter that are full of the uniferous tubules. which alone can pick up the constituents of urine from blood.
The kidneys are full of extra blood-vessels, in order that the largest possible amount of blood may be taken inside it, for the manufacture of urine.
The ureter is a small pipe possessing worm-like or peristaltic movements, leading from the kidney towards the urinary bladder.
The urinary bladder is a muscular bag for the collection and voiding of urine. It is situated behind the symphysis pubis and is palpable above its brim, only when full. In the male, it lies anteriorly to the rectum; in the female, it lies anteriorly to the uterus. The passage whereby the urine is voided out from the bladder, is called the Urethra. In the female, the urethra is only an inch and a half long, is nearly straight and is intended only for voiding urine. In the male the urethra is nine inches long, has two bends and serves the double purpose of urination and insemination.
Comments are closed.