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The Parts and Function of the Urinary System

Updated on November 13, 2009

The Parts and Function of the Urinary System

Our body is like a machine . Machine needs oil or gasoline to work. Our body needs food in order to carry out its activities. Once the food has reached the body systems, they are quickly used for energy. In the process, wastes materials are produced which need to be removed from the body. The solid waste material comes out through the anus, while the fluid material is eliminated through the urinary system.

The Urinary System and Its Major Parts

1.       Kidneys- the kidneys are two brownish, bean shaped organs about the size of a fist, they weigh about 5 ounces. They are located in the upper right and left back part of the abdominal cavity. Each kidney contains about 1,200,000 microscopic filters called nephrons. Nephrons are smaller than the smaller dots.

The main function or the kidneys are to maintain the water balance and to eliminate waste materials from the blood.

2.       Ureters – the left and the right ureters are long muscular tubes. They are about 12 inches long with a diameter 2 to 3 millimeters.

The ureters connect pelvis of each kidney to urinary bladder. They carry urine from each kidney to the urinary bladder.

3.       The Urinary Bladder – the urinary bladder is a muscular sac that holds urine. It is located in front the pelvis and behind the pubis. As the bladder fills walls stretch signaling the desire to urinate.

4.       The Urethra- the urethra is a muscular tube which carries urine from the bladder to the outside part of the body. In the female, it is a one inch long from the bladder to the cleft of the labia. In the male, it is several inches long from the prostate gland to the penis. When one is about to urinate, a value in the urethra relaxes to allow the urine to flow out.

The Urinary System Cleans the Blood

Waste Products

During normal activity of the body, waste product are formed. The chief waste of the body are carbon dioxide, water, urea and salts. Carbon dioxide is eliminated through the lungs while water, urea and salts are eliminated through the urine. Urea is a product resulting from the breakdown  of protein foods and of protoplasm. It is excreted mainly but the kidneys.

Urinary Systems Mechanism

1.       Glomerulus – each nephron is composed of a glomerulus. The glomerulus is surrounded by hollow capsule known as Bowman’s Capsule. The capillaries in the glomerulus filters the waste materials of the blood except protein and the cells.

2.       Filtered Fluid – the filtered fluid enters the bowman’s capsule, where it flow down through its twisted tubes. The walls of the tubes absorb back in to the blood the needed water and blood chemicals.

3.       Pathway of Unwanted Chemicals – Unwanted chemicals are discharged. The unwanted chemicals are the waste products. They come out in the form of urine. The urine passes into the ureter and on to the urinary bladder. And the urethra which releases it to the outside of the body. Urine gives valuable clues to the body. Sugar in the urine is an indication of diabetes. Albumen may signify that the kidneys are not functioning properly.


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    • docashp profile image

      Ashp 11 months ago from india

      Nicely explained.You have made it simple and easy to understand.

    • profile image

      blessing 2 years ago

      thnx guyz it as bn of great help to me during my revision work.

      Easy to understand

    • profile image

      you 2 years ago

      wala akong maintindi han

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      Xyron 2 years ago

      Thanks nagawa kopo research ko

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      carla jean:-) :-) 2 years ago

      Wow, this parts of function is so great you can learn more,

      Yes, my assignment was sold.

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      phillip andrei villanueva 2 years ago

      May assignment sana ako kaso kulang yung parts

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      althea 2 years ago

      THANK YOU I finish my homework ^_^

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      2 years ago

      awsome ^-^

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      hahahahahah wla nmn d2 c nasagot qo eh

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      Hey samson dont speak bad words

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      im pretty girl! 3 years ago

      pls.. don't say bad words!. thank you for helping my homework!. :)

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      jj 3 years ago


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      ako pretty girl

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      david alquiza 3 years ago

      Thanks to this really helps a lot in answering my homework..God bless..

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      help me pleaseeeeeeeeeeeeeee criyinggggggggggggggggggg

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      cielo galang 3 years ago

      ako maganda

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      thanks this

      nakakatulong tlaga i2 sa "kin

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      noemi eugenio 4 years ago

      ganda ang dami mong alam

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      ella 4 years ago

      tnx. naka tulong sa project ko

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      tnx. it help me to do my project and also my homework:)

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      it is very good

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      secret 4 years ago

      ang gagaspang nyung lahat except othres that are good

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      Yolo 4 years ago

      It was nice but it could be a little more explanatory

    • profile image

      nickz 4 years ago

      anu ba yan bakit apat labng ba yong parts ng urinary

    • profile image

      Ruqaiyah :) 4 years ago


      Good Information..

      but What i need is not their in the paragraph :(

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      mizsayunacko 4 years ago


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      oo nga tama si Jacob

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      nick 4 years ago

      walang kwenta

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      Dansell 10 yo 4 years ago

      Patulong namn po

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      ricky 4 years ago

      maganda talaga pag-aralan ung urinary system

    • profile image

      asap 4 years ago

      meeeeeeeeeeeeep I don not like it is that all

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      mori 4 years ago

      yes now i know what are the major organ of urinary system]

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      asa 4 years ago

      Hahahhahaha perfect!

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      wow..................................... ang galing

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      Thanks for helping me for my homework..

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      wow nice!!!!!!!!!

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      cherie annealao 4 years ago

      halow po yan po ba tlaga parts ng urinary system

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      Jana just invited someone over! 4 years ago

      interesting to my homework

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      aleqxis 4 years ago


    • profile image

      patrick dulo 4 years ago

      dami kong natutunan thankyou

    • profile image

      UnknownlyAnonymous. 4 years ago

      Thanks Dude/Dudette!~ :D

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      rhen 4 years ago

      thnx :)

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      annaliza (rainaleen) 5 years ago

      thank you for the article it helps on my homework

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      helped alot with my project

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      I hope I can pass my exam..........GOOD me

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      wow! ha talino

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      mukhang tanga

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      wala naman po dito yung excretory system po eh.

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      respiratory system ung nosetrils hindi urinary system

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      putang ina nakaka tulong pala ito puta leche gago pacyu tang ina mo tarantado...

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      pano yan nakalimuta ko yung notebook ko sa school nasa notebook pa yung ka

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      Allan 5 years ago

      Good!Nice one



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