The Importance of Nephrons in Kidneys Essay

3144 Words Dec 2nd, 2014 13 Pages
The Importance of the Nephron in Kidneys

All living organisms require a source of energy, usually in the form of food, to satisfy the cellular demands of the body and ultimately to sustain life. Thus, the nutrients that are consumed by organisms are broken down by various processes within organs, tissues, and cells, in order for important molecules, like minerals, vitamins, proteins, and carbohydrates, to be taken up and distributed around the body. The molecules not needed by the body or ends up as excess in the blood, is discarded as waste products; the system that is responsible for filtering our body, or rather our blood from these waste products, is known as the urinary system. The urinary system consists of organs in the body
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However the amount of urine excreted depends on many factors, especially the amounts of fluid and food a person consumes, and how much fluid is lost through sweat and breathing. Also certain types of medications can also affect the amount of urine eliminated as well (Campbell, “Excretory System”). In the urinary system there are important organs that aid in the production and elimination of urine, and they are the ureters, urinary bladder, urethra, and kidneys. Leaving the kidneys for last to discuss, the ureters, which are thin tubes ranging from 8 to 10 inches long (“Your Urinary System and How it Works”), transports the urine made from the kidneys to the urinary bladder. Muscles in the ureter walls constantly contract and relax to force urine away from the kidneys, and if the urine doesn’t migrate, or it backs up towards the kidneys, an infection can develop (“Your Urinary System and How it Works”). On average, urine drips every 10 to 15 seconds into the urinary bladder where it is temporarily stored until it is time for its release (Campbell, “Excretory System”). The unique features of the urinary bladder allows for it to store and expel the urine through the urethra. As a muscular, balloon-like organ, it is held in place by ligaments in the pelvic area (Campbell, “Excretory System”). The transitional epithelium swells and becomes a round in shape

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