Sunday, 14 October 2012

Life Processes of Humans: Humans Excrete and Defecate

Humans excrete and defecate to get a rid of waste materials from their bodies. We excrete urine and sweat. They contain water. When we defecate, our bodies get rid of undigested food or waste materials called faeces. Why do we get rid of these waste materials? We get rid of them so that they would not harm our health.


Humans defecate




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