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made up of a number of layers.
undifferentiated cells found in almost all organisms that have the ability to develop into any...
a blind-ending lymphatic capillary found inside each villus for the absorption of the end...
a sensation of unease and discomfort in the upper stomach with an involuntary urge to vomit. A...
a prolonged period of low rainfall which has a negative effect on plant, animal and human life...