Q4. How does a trachea look? Why should'the trachea be open all the times Q5. Describe the lungs. Explain the activities taking place in the lungs. VI. GENERALIZATION: What is the main part of the respiratory sytem? How will you take care of this?
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Q4. When a person eats, the rear of the trachea is softer to allow the esophagus to expand. Because of their close closeness, a small piece of cartilage in the larynx covers the aperture of the trachea while the individual eats, preventing food or drink from entering into it.
Q5. The lungs are a pair of organs located in the chest. Air enters your lungs as you inhale (breathe in), and oxygen from the air flows from your lungs to your blood. Carbon dioxide, a waste gas, flows from your blood to your lungs and is exhaled at the same time (breathe out).
VI. GENERALIZATION
> The nose, mouth, throat, voice box, windpipe, and lungs are all part of the respiratory system. The respiratory system receives air through the nose or mouth. The air gets warmed and humidified when it enters the nose (also known as nares).