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.
Overview. Urine is produced in the kidneys, which are important organs for the health of our body. When we take fluid in, it passes from our digestive system into our circulatory system, where it is filtered through the kidneys. The kidneys get rid of waste products through the urine. The ureters are tubes that connect the kidneys to the bladder. The bladder empties the urine via the urethra, the tube through which we urinate. Dark urine is most commonly due to dehydration and concentrated urine. However, it may be an indicator that excess, unusual, or potentially dangerous waste products are circulating in the body. For example, dark brown urine may indicate liver disease due to the presence of bile products.