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Question
The trachea do not collapse even when there is not much air in the lungs because they are:
The trachea do not collapse even when there is not much air in the lungs because they are:
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Solution
The correct option is C supported by rings of cartilage.
In humans, air passes through the nostrils into the throat where it passes through the trachea (windpipe) and further into the lungs where the gaseous exchange takes place. The passage of the trachea is lined by C-shaped rings of cartilage which provide structural support to the air passage and prevent it from collapsing.
In humans, air passes through the nostrils into the throat where it passes through the trachea (windpipe) and further into the lungs where the gaseous exchange takes place. The passage of the trachea is lined by C-shaped rings of cartilage which provide structural support to the air passage and prevent it from collapsing.
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