Yes they do.
Kidneys
Urine, if it is liquid waste, or feces if it is solid waste. but i don't actually think kidneys process the solid waste... hope this helped! ;D
The Excretory system which has the kidneys. The kidney filters the blood directly. Urinary system: kidneys, ureters, bladder are involved in fluid balance, electrolyte balance and excretion of urine.hold urine in for longer time always good for health because it cause remove bad waste products from body and not cause urinary tract infections because use toilet always bad for health because it not cause remove bad waste products from body and cause urinary tract infections each day and night.
A sieve.
hemoglobing
Blood cells and plateletes
The solid particles are bigger than the openings in the filter. Much like wind or rain will pass through a chain link fence that will keep pets in the yard.
red blood corpusles white blook corpusles platelets
Your kidneys remove one type of waste your liver removes a different type of waste. Your kidneys remove urea and anything else your body will never want to use again. Your kidneys remove dissolved items from your blood stream. Your liver removes wastes that can be re-digested and used again in the process of digestion. Your liver also removes unwanted solid material from your blood stream.
its not sieving actually it is filteration,when we want to separate solid particles from our sample,we filter it by using filter paper..
In a filtration process, water passes through a filter which traps solid particles and impurities. The filter typically consists of porous material that only allows water molecules to pass through, while blocking larger particles. This results in clearer water as it removes suspended solids and impurities from the water.
Filtration can be used when you want to filter solid or unwanted particles out of a liquid such as water.