science lesson 8th standard 11 human body and organic organ system
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The human body and organic organ system is where varied organs work together to conduct varied functions. It is much like how the digestive system uses differ organs to break down food and transform it to energy. Circulatory system in the human body helps transport blood in all the parts of the body. Respiratory system helps us in breathing and diffusing oxygen to the blood. The excretory system helps create and eliminate waste from the body.
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