Answer:
Larynx is the top part of the trachea. It is also called the voice box. The larynx contains the vocal cords. These are V shaped ridges of muscle tissue on the inside lining of the larynx. They vibrate when air passes between them too produce speech. When you breathe in, air passes in to the larynx and down the trachea towards the lungs. When you swallow, the larynx moves upwards slightly and a flap of cartilage tissue at the back of the tongue called epiglottis closes over the entrance to the larynx. This ensures that food or drink go down the oesophagus (gullet) and not down the trachea.
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