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Which organ of the human body purifies the blood by removing waste?
A. The heart
B. The kidneys
C. The lungs
D. The stomach
Correct Answer Is Option = The kidneys
Notes / Explanation
The organs of the human body that purify the blood by removing waste are the kidneys, a pair of organs that act as the filters of the body, cleaning the blood and removing waste substances from it. The body has two kidneys, located in the back part of the abdomen, one on each side, and they are shaped somewhat like beans. The main function of the kidneys is to filter the blood, removing from it the waste substances and the excess water that the body needs to get rid of, and forming these into urine, which is then passed out of the body. As the blood flows through the kidneys, it is cleaned, with the waste products and excess water being removed, while the useful substances are kept in the blood, so that the kidneys act as a very effective filtering and cleaning system for the blood. In this way the kidneys perform the vital function of removing the waste products that are produced by the workings of the body and that would be harmful if they were allowed to build up, so that the removal of these wastes by the kidneys is essential to health. Besides removing waste and excess water, the kidneys also help to control the balance of water and certain substances in the body, keeping them at the proper levels, and they carry out certain other important functions as well. The kidneys are therefore vital organs, essential to the health of the body, and serious damage to or failure of the kidneys is a grave matter, which may require special treatment to take over their function of cleaning the blood. The care of the health of the kidneys, including the drinking of enough water, is important. The study of the organs of the body, including the kidneys, and their functions is an important part of the study of the human body. For PPSC and other competitive examinations, the key points to remember are that the organs that purify the blood by removing waste are the kidneys, that there are two kidneys, located in the back part of the abdomen, one on each side, that their main function is to filter the blood, removing waste substances and excess water and forming these into urine, and that they also help to control the balance of water and certain substances in the body, so that they are vital organs essential to health.
