Excretory system mainly comprises of organs that function to remove the metabolic wastes and toxins from the body. In humans, it is merely inclusive of removal of urea from the blood and waste from the body. The overall removal of urea takes place in the kidney, whereas solid waste is removed from the large intestine. Excretory system in human being comprises of kidney and bladder. Kidney aims to filter urea and another kind of waste products from blood. After that, it is added to the urine within the bladder. There are some other organs like liver which produces toxins where waste is put back into the blood. It is mainly the function of kidney to filter the blood so that any kind of toxin does not accumulate. Excretory system comes up with similar function, which is beyond the removal of waste product from the body. It is very much important in maintaining internal homeostasis. Some of the vital parts of excretory system are completely influenced by other body systems like muscular system and skeletal system. Kidney secretes hormone which tells the bone to produce much more red blood cells.

Excretory system aims to function like bulwark and provides balance to the digestive system. People can easily consume food and drink, which is needed for nourishing body and providing energy. Excretory system aims to ensure the level of homeostasis irrespective of changes in the nutritive value to food. Excretory system aims to regulate the balance of fluid in the body, which helps in maintaining proper salt and water level. The excess water in the blood is removed by the production of hypotonic urine. If salty food is consumed or water is lost by perspiration, then the concentration of urine is improved, which is needed for preserving osmolality of blood fluids.

Kidney stone is known to be hard deposit of minerals and salts that are formed inside the kidney. Kidney stone can result in various causes for kidney and affect the urinary tract from kidney to bladder. Stones within the urine can become concentrated, which allow materials to easily crystallize out and stick in together. Passing out kidney stone can be considered to be bit painful. If the stones are recognized on time, then they do not create any kind of permanent damage. Based on the condition, patient needs to take medicine and drink correct quantity of water.

Kidney stones do not have any a particular cause as there are various factors which result in this formation. Kidney stone is formed when urine comprises of crystals-forming substance like calcium, oxalate and uric acid. The fluid in the urine is known to be dilute in nature. At a similar instance, urine may lack certain substances which prevent the crystals from sticking together.  If this happens, then it results in creation of environment which is ideal for kidney stone to form. If the suffering patient has an idea concerning type of kidney stone, then it will help in analysing risk involved in getting more number stones.