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.
psoriasis-a chronic skin disease characterized by dry red patches covered with scales; occurs especially on the scalp and ears and genitalia and the skin over bony prominences.disease of the skin, skin disease, skin disorder-a disease affecting the skin.acanthosis-an abnormal but benign thickening of the prickle-cell layer of the skin (as in psoriasis). Translations. [sÉËraÉªÉsÉªs] N â soriasis f. common chronic, inflammatory skin disease characterized by scaly patches. psÅriÄsis = psÅrÃ­Äsis- , psÅriÄ variant. s of psÅrian psÅriÃ¢n to have (an itch derivative of) + -psá¹ra-itch ]. sisâ¢sisâ¢psoâ¢ri (at ic ËsÉr, iËaet-) iËÃ¦t. Éªk ËsoÊr adj