Red blood cells are thus much more common than the other blood particles: there are about 4,000â11,000 white blood cells and about 150,000â400,000 platelets in each microliter of human blood. Human red blood cells take on average 20 seconds to complete one cycle of circulation.
Â­Â­Your kidneys receive the blood from the renal artery, process it, return the processed blood to the body through the renal vein andÂ­ remove the wastes and other unwanted substances in the urine. Urine flows from the kidneys through the ureters to the bladder. In the bladder, the urine is stored until it is excreted from the body through the urethra. Now let's take a look inside your kidneys.
1 Once you have passed one half length of the catheter through external meatus, lower the penis and slide the catheter the rest of the way into the bladder until urine flows. 2  Allow the bladder to empty completely.  To remove the catheter, slowly rotate it as you withdraw it. Stop each time more urine drains.