👉 Pissing fluid, or urine, is a complex biological waste product formed by the kidneys during the filtration process of blood purification. It primarily consists of water, urea (a waste product from protein metabolism), small amounts of creatinine, electrolytes like sodium and potassium, and waste products such as ammonia. The fluid also contains organic compounds and certain drugs or toxins that the body cannot easily eliminate. After filtration, urine travels through the urinary tract—bladder and ureters—to the bladder for storage until it is expelled from the body during urination.