1 The kidneys are used to remove excess water and ions from the blood. 2  These are then expelled as urine. 3  The kidneys perform a vital role in homeostatic regulation in mammals, removing excess water, salt, and urea from the blood.
Ectoparasites Parasites that live on the outside of the host, either on the skin or the outgrowths of the skin, are called ectoparasites. They are directly transmitted between hosts.
Posted on. by admin. Endoparasites vs Ectoparasites. A parasite is an organism that lives on or in another organism, known as its host, from which it obtains nutrients. A food relationship between host and parasite is known as parasitism. This relationship is harmful to the host, but it is beneficial to the parasite.This may cause severe diseases in many hosts.ctoparasites. Parasites that live on the body surface of an organism are known as ectoparasites or external parasites. These parasites can be often found in both plants and animals. Ectoparasites either suck blood (animal parasites) or juices (plant parasites) or feed on living tissue.