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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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.ncient cultures used the circle to note the way that time and seasons passed in a cyclical way. The circle in alchemy is used for a focus point. Certain Native Americans saw the circle as a symbol of a few different things. They saw the circle as the sun and as the moon and the children of the moon.