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A-Level Biology OCR A

Trachea Structure Cartilage Describe Explain Makes Adapted Function

The trachea, supported by incomplete cartilage rings and lined with ciliated epithelium and goblet cells, conducts air to the lungs while trapping and removing dust and pathogens.

The trachea is a wide tube supported by incomplete cartilage rings, lined with ciliated epithelium and goblet cells, which trap and remove dust and pathogens from inhaled air.

Front Describe the structure of the trachea & explain how its structure makes it adapted for its function
Back Trachea:
  • Main function: airway carrying clean warm moist air from nose into chest
  • Wide tube supported by flexible cartilage - stop trachea from collapsing
  • Incomplete cartilage rings - food can move easily down oesophagus behind the trachea
  • Lined with ciliated epithelium with goblet cells - secrete mucus to trap dust and pathogens which is moved away by cilia to be swallowed and digested

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