Changes

This includes the '''pinna''' and the '''ear canal''' (''external auditory meatus'') down to the level of the '''tympanic membrane'''.

This includes the '''pinna''' and the '''ear canal''' (''external auditory meatus'') down to the level of the '''tympanic membrane'''.

The pinna comprises the '''auricular [[Bones and Cartilage - Anatomy & Physiology#Structure and Function of Cartilage|cartilage]]''', which is flared distally into a flattened cone shape, covered by skin on both sides - more tightly on the medial or concave side than the convex side.  The [[Hair - Anatomy & Physiology|hair]] covering on the convex side is usually similar to the rest of the body but the hair covering on the concave or medial aspect is variable.  There are also irregularities on the concave surface with ridges and prominences, the '''medial and lateral crus of the helix''' on the medial aspect of the opening of the external ear canal, opposite the rectangular '''tragus''' on the lateral aspect.

The pinna comprises the '''auricular [[Cartilage - Anatomy & Physiology#Structure and Function of Cartilage|cartilage]]''', which is flared distally into a flattened cone shape, covered by skin on both sides - more tightly on the medial or concave side than the convex side.  The [[Hair - Anatomy & Physiology|hair]] covering on the convex side is usually similar to the rest of the body but the hair covering on the concave or medial aspect is variable.  There are also irregularities on the concave surface with ridges and prominences, the '''medial and lateral crus of the helix''' on the medial aspect of the opening of the external ear canal, opposite the rectangular '''tragus''' on the lateral aspect.

[[image: Rabbit ears.jpg|thumb|250px|left|Two rabbits: one with wild-type erect pinnae, the other with pendulous pinnae for comparison]]

[[image: Rabbit ears.jpg|thumb|250px|left|Two rabbits: one with wild-type erect pinnae, the other with pendulous pinnae for comparison]]