The urinary system consists of the kidneys, ureters, urinary bladder, and urethra.The kidneys filter the blood to remove wastes and produce urine.The ureters, urinary bladder, and urethra together form the urinary tract, which acts as a plumbing system to drain urine from the kidneys, store it, and then release it during urination.t the same time that the sphincters relax, the smooth muscle in the walls of the urinary bladder contract to expel urine from the bladder. Production of Hormones. The kidneys produce and interact with several hormones that are involved in the control of systems outside of the urinary system. 1  Calcitriol.
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It is a symbol of revolution, of being centered and mobile. It is a symbol of forever. The meaning of the circle as a symbol is universal. It is seen as a divine sign, sacred to several cultures.It symbolizes the ongoing energy found in nature. It symbolizes the way the universe includes everything. The circle has a lot of different meanings.eltics saw the circle as a symbol of space and the universe. Chinese use the circle to symbolize heaven, and a square to symbolize earth. Chinese art has used squares inside of circles. They used the square inside the circle to represent heaven and earth being united.