Platyhelminthes are also known as flatworms because they are worms with a flat body. This is the main external morphological feature that differentiates them from nematodes (roundworms).
Even though 85 percent of kidney stones are small enough to pass during urination, fewer than 50 percent of patients chose this option. A person with a normal-size ureter can usually pass a kidney stone with a diameter less than 5 mm (about 3/16 of an inch) without significant pain or risk of kidney damage.
The matter of how long it takes to pass kidney stones therefore has no definite timeframe. There are factors, which contribute for kidney stones to pass quickly, sometimes even without pain. The size of the kidney stone, physiology of a person, his lifestyle and the treatment all contribute to the time frame. Click here to discover how you can remove your kidney stone naturally.