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The common passage for air and food in the human body is the
The pharynx forms the common passage for air and food in the human body.
You experience sudden coughing while swallowing food. Why does this happen?
You experience sudden coughing while swallowing food because of incomplete closure of the epiglottis which directs the food into the windpipe instead of the food pipe.
Why does the trachea not collapse when we exhale air?
The trachea is lined with C-shaped cartilaginous rings which hold the shape of the trachea and prevent it from collapsing.
Which of the following characteristics enable the smooth exchange of gases at the alveoli?
I ⟶ Thin membrane
II ⟶ Network of blood capillaries
III ⟶ Large surface area
The alveoli have a large surface, thin membrane and rich network of blood capillaries which facilitate the smooth exchange of gases.
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