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A Search For Better Health Topic 7: First Line of Defence

A Search For Better Health Topic 7: First Line of Defence. Biology in Focus, HSC Course Glenda Childrawi , Margaret Robson and Stephanie Hollis. DOT Point(s) . identify defence barriers to prevent entry of pathogens in humans: skin mucous membranes c ilia chemical barriers

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A Search For Better Health Topic 7: First Line of Defence