What Are the Major Organs of the Excretory System?


The major organs included in the excretory system are the lungs, liver, kidneys and the skin. The excretory system removes wastes that accumulate in the body.


The excretory system is necessary to a healthy body. Waste products collect in the body and can be toxic unless they are eliminated. The organs of the excretory system work together to eliminate wastes and maintain a healthy body.


The organs of the excretory system work together to take these toxins out of the body. Blood flows through the lungs carrying wastes. Respiration takes place and removes those wastes cleaning the blood. The liver breaks down toxic substances and converts some of them to nontoxic substances. The kidneys filter blood by removing wastes and sending liquid waste to the bladder for elimination. The skin eliminates wastes through sweating.


The lungs are found in the chest area on either side of the breastbone. The liver is in the upper right section of the abdomen below the diaphragm. The two kidneys are at the end of the abdomen on either side of the spine. The skin covers the entire body and contains glands that allow it to sweat.


If any of the major organs malfunction or stop working, it can cause harm to the body. If both kidneys stop working, then waste must be eliminated by mechanical measures called dialysis. Blood is run through a machine to remove the wastes, then in is run back into the body to collect more waste. This process must be done periodically to prevent dangerous build-up of waste.


There is a misconception that the excretory system will not work with only one kidney. That is false. One kidney is sufficient for the system to work. It is only when neither kidney will work that the excretory system is in danger.

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