When we study the anatomy of the larynx, a pattern is seen emerging. The number 3, its multiples and, fractions of 3 like 1/3 and 2/3 come throughout the description. The larynx is made up of three structures, namely, cartilages, muscles, membranes and ligaments. The cartilages are nine in number. The muscles are divided into nine groups. The membranes and ligaments are also grouped into nine. Inside the larynx there are three levels. There are three folds outside the larynx and three pairs of folds inside it. The nerve supply comprises three nerves. There are three pairs of joints in the larynx.
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