Excretory System Organs


excretory-system-function-wallpapers-41The excretory system  includes many of your vital organs. It is a system that manages all excretions (wastes, toxins, and other materials) and removes them from the body entirely. This prevents your body from being damaged, but also optimizes it so it functions in every way possible optimally. The excretory system keeps the perfect balance!

There are numerous organs in the body- that all collect and process wastes. Because of this waste production and refinement it needs the excretory system to further cleanse and extract the wastes so they can be removed entirely from all systems and the body itself.

The excretory system includes: the lungs, the liver, the large intestine, the skin, and all 4 organs of the urinary tract.

Excretory System Organs: The Breakdown of their Functions


Human-Lungs-e1282672883815The Lungs

The lungs are a big part of our ability to live as it performs most respiratory functions. Without oxygen our cells cannot and will not thrive. The waste part of our breathing process involves the expelling of carbon dioxide. The lungs expel the carbon dioxide by their alveoli which breakdown the carbon dioxide that is present in the bloodstream. Once the alveoli have performed their job, the carbon dioxide is then disposed of out of our bodies by way of exhalation out of our nose or mouth.

058 Urinary systemThe Urinary System

The Urinary system is made up of a total of four organs that all work together to help excrete excess waste and toxins out of the human body.


We have two kidneys which are located on the upper right and upper left part of our abdomen. They are fueled with blood by two main arteries known as the renal arteries. The Kidneys process our bodies essentials and wastes (ie. acids, glucose, water, urea, and ammonium.) Once it has used what it needs it then expels the rest into urine, once the urine is processed it is then passed into the ureters (to be processed by the bladder) to be excreted out of the body.


Each kidney contains one ureter that transfers urine from the kidneys to the bladder. The ureters are shaped like a tube and are about 30 centimeters in length at most.. They make a path passed the walls that run laterally around the pelvis and then curve around the bladder towards the back. The help excrete waste from the kidneys by being the path to the urinary bladder for which urine travels through.


The urinary bladder or just plain bladder helps to expel and excrete wastes processed through the urinary system by capturing and holding the urine that has traveled through the ureters from the kidneys. It is in the bladder that urine may sit until the bladder becomes full and a sensation is felt as a need to urinate. The bladder is much like a muscle that is elastic like a rubber band. It sits right above the pelvic floor and functions by holding the urine until the urethra passes it out.


The urethra is a tube which connects a person’s urinary bladder to their genitals so that urine can be removed from the body. In females, the urethra exits on top of the vaginal opening. The urethra in males is longer and it carries urine (as well as sperm) through the penis. There is also an external urethral sphincter which allows us to voluntarily control urination.

figure_22_29a_labeledLarge Intestine (Colon)

The large intestine also known as the colon is one of the biggest organs that aids in the transport of fecal waste and that helps the body in the process of excreting waste. This organ can have a length up to  feet. It works to extract water from waste and processes it to be solid waste.  Food that is passed through the digestive system, that does not get thoroughly absorbed by the small intestine will be taken care of in the large intestine. Once the large intestine has performed its job the fecal matter is then passed down to the rectum and out of the person’s body as stool.

The Liver


As one of our vital organs, and one that plays a major role in the excretory system- the liver’s job is to detoxify and to remove any type of toxin in the form of foreign chemicals, poisons, or otherwise out of our body. The liver converts ammonia into urea. The liver also is responsible for bile production which is an essential for the break-down of fat. It also helps to aid in many functions of the circulatory system as it levels out blood glucose (insulin) that is present in the system. It is also an important excretory systems organ that detoxifies and removes toxins and poisons from out blood.

The Skin


As you may have already guessed the skin is an important part of the excretory system because that is where you sweat from. The skin helps to eliminate wastes and excess toxins out of the body in the form of sweat. When you sweat you are excreting salt, water, and urea. In addition, the action of sweating performed by the skin also is important for keeping the body cool and at a normal body temperature. Wastes that are expelled out of the skin are diffused from the blood stream, processed through the sweat glands, and then actually ‘sweated out.’


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