Nematoda- The Roundworm Phylum
AscarisIt's entire system is uriotelic. It's controlled by a renete cell. That s connected to 2 small canals that are anterior, and 2 large canals. These canals ends are then closed after the food is collected. These canals are connected in front of the renete cell. This is done by canalculi. The waste is then gotten rid of through the excretory pore.
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NematodesWaste is turned into an ammonia and is excreted through the body. The process of the nematode excreting salt is necessary to keep osmotegulation. Usually, the nematode has 2 glands which excrete salt via a pore near the pharynx of the animal.
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RotiferThe food travels to its stomach where all the nutrients are taken out of it. Then it goes into the short intestines which take it to a pair of ProtoNephridium(small kidneys) , which drain the waste into the bladder and then into the Cloaca which is an opening that gets rid of the waste. this is called Protonephridia
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