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19-09-2017
Biology

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cell lining the human respiratory tract have projections that help keep the passageway clean, moving debris and mucus up and out. these cellular projections are

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02-10-2017

Cilia. Cilia are organelles that are on cells that serve as to make them mobile. However the human respiratory system has used these cilia to move debris that can obstruct the passage way. The debris is then eventually covered in mucus to prevent any further agitation.

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