The ear is supported mainly by thin cartilage arranged in circumvolutions. Although its morphological characteristics vary greatly, its overall shape recalls a seashell and is fairly similar in both sexes. Ears are often partly hidden by one's hair and their expressive character depends on their precise position on the sides of the head, as I have shown in the sketches below.
In an adult, the height of the ear corresponds, on average, to that of the nose; in a child it looks rather big in relation to the head; and in an elderly person it tends to lengthen because of the thinning and weakening of the cartilage tissue.
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