Which of following should fill Blank Number 3 of paragraph?

The correct answer is Larynx.

Key Points 

• The larynx is also known as the voice box.
• It is a cartilaginous box that helps in sound production and hence it is called the soundbox.
• It is a flexible tube where air passes between the back of the pharynx and the trachea.
• It is generally made of cartilage and muscle and is lined with a mucus membrane.
• The larynx helps to provide smooth passage of air from the nasal cavity to the lungs.
• When we swallow food, the epiglottis covers the opening of the larynx to keep food and drink from entering the airways.
• It is located in the neck.
• Functions:
  • swallowing
  • breathing
  • voice production
• The vocal cords vibrate when the air passes through them.
• This creates sound waves in the pharynx, nose, and mouth.