The trachea, also called the windpipe, is part of the passageway that supplies air to the lungs. Any prolonged blockage, even for a few minutes, can cause death. The trachea is about 4.5 inches long ...

Part of Biology (Single Science) Cells, organ systems and ecosystems The air that enters the nasal cavity flows down the trachea. The trachea has a number of adaptations: cartilage rings in the walls ...

MARSHFIELD, Wis. — What you would probably notice first about Thomas Richards are his eyes. He's just 18 months old, but perhaps because he is unable to speak, he uses his eyes the way other babies ...