urinary system

The function of the urinary system is to get rid of liquid waste and soluble waste.


The organs of the urinary system are the kidneys, which remove liquid waste from the body in a for of urine,  keep a stable balance of salts and other substances in the blood, and produce a hormone that aids the formation of red blood cells. The ureters, which carry urine from the kidneys to the bladder. As well as the bladder which stores urine and the urethra, which allows urine to travel outside of the body.

Interactions: The urinary system works with the circulatory system. Blood that goes through the circulatory system also passes through at least one of your kidneys. As well as waste travels through your bloodstream and once it reaches the kidneys it's cleaned and water is returned.

Analogy: Image result for dam

Kidneys are like the dam itself because the kidneys filter out waste from the blood just like the dam affects the quality of the water by changing the amount of oxygen and the temperature of the water. The ureters are like the penstock in the dam because the ureters carry urine from the kidneys to the bladder like the penstock, which is a pipeline that carries water to the turbine. The bladder is like the structure of the dam because it holds urine until it is released just like how the dam holds water until it is released. Then the urethra is like the tailraces. The urethra transports urine out of the body, similar to how the tailraces of a dam transport water out of the dam after being run through turbines.

Structure and Function: The ureter's function is to carry urine to the bladder. The only way it can do this is if it is a tube that can hold liquid. Therefore it makes sense that it looks like a tube. Also, the walls of the ureter continually tighten and enlarge, the reason for this is so that urine goes down to the bladder. If it were to go up, it would result in a bad infection.

Links: http://www.biology4kids.com/files/systems_excretory.html, http://www.bbc.co.uk/schools/gcsebitesize/science/triple_edexcel/control_systems/the_urinary_system/revision/1/http://kidshealth.org/kid/htbw/pee.html, http://kidshealth.org/en/kids/usmovie.html


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