Digestion in Human Beings 3D CBSE Class 7 Science (www.iDaaLearning.com)
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Description: http://www.idaalearning.com/ Human beings take food through mouth and digest it in specific organs for digestion. The undigested food is defecated. The food we take passes through a specific canal which begins with buccal cavity and ends at the anus. This canal is called alimentary canal or the digestive tract.
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