External Acoustic Meatus at Anatomy

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External Acoustic Meatus. The external acoustic meatus (meatus acusticus externus; First, it extends medially and slightly anteriorly and superiorly, then it turns medially and slightly posteriorly (cartilaginous part), and finally passes medially, anteriorly and.

Photograph of the lateral osseous external acoustic meatus
Photograph of the lateral osseous external acoustic meatus from www.researchgate.net

The external acoustic meatus (meatus acusticus externus; External acoustic meatus is 24 mm long, of which medial two thirds (16 mm) are bony and lateral one third (8 mm) is cartilaginous. In length if measured from the tragus;

Photograph of the lateral osseous external acoustic meatus

The outer or lateral third of the external acoustic canal is the cartilaginous part. The adult human ear canal extends from the pinna to the eardrum and is about 2.5 centimetres in length and 0.7 centimetres in diameter. The structure of the external auditory canal is the same in all mammals. The external acoustic meatus (meatus acusticus externus;