Each member of the body has its own use and is called an organ. Several organs may work together. For example, the mouth,teeth,gullet,stomach, small and large intestines and pancreas all work together in the digestion of the food; these are collectively called the digestive or gans.
The nose, pharynx, trachea and lungs work together in getting fresh air into the body, and getting rid of the carbon dioxide and for this reason they are called the respiratory organs.
The heart and all the large and small blood-vessels work together in the causing the blood to circulatory organs.
The kidneys, skin,lungs,liver, and large intestine all work together in getting the waste matters out of the body, for this reason they are called the excretory organs. The brain, the spinal cord and all the large small nerves work together in directing and controlling all the other organs of the body, these comprise the nervous system.
In addition to the above -mentioned organs there are bones,which serve as the framework and give shape to the body, and the muscles, which move all the parts of the body.
If all the parts of the body are protected and their needs supplied, one will have perfect health.
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