Parts of the Respiratory System Air is breathed into the nose, where it is filtered by cilia (tiny hairs) and warmed and moistened by mucus. The epigl
{"Image DocumentName": "Parts of the Respiratory System", "Image ImageDescription": "Air is breathed into the nose, where it is filtered by cilia (tiny hairs) and warmed and moistened by mucus. The epiglottis (a small flap of cartilage) stops food going into the windpipe instead of the gullet. The larynx is the voice box. The windpipe or trachea is a flexible tube held open by rings of cartilage. The lungs are soft and spongy and are in a space called the thoracic cavity. The pleural membrane is a slippery skin that protects the lungs as they rub against the ribs. The ribs protect the lungs. Intercostal muscles in between the ribs help us breathe in and out. In the lungs, the trachea branches into two bronchi. Each is a bronchus. The bronchi branch into smaller bronchioles. The bronchioles end in bunches of tiny air sacs called alveoli. Their walls are thin so gases can pass through them.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}