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Question
Which one of the following is surrounded by a rich amount of capillaries?
Which one of the following is surrounded by a rich amount of capillaries?
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Solution
The correct option is A Alveoli
∙ The alveoli are surrounded by tiny blood vessels, called capillaries. It is the alveoli that receive the oxygen and pass it on to the blood.
∙ Alveoli and capillaries both have very thin walls, which allow the oxygen to pass.
∙ Trachea, also called the windpipe, is a cartilaginous tube that connects the pharynx and larynx to the lungs.
∙ Nostril is either of the two external openings of the nasal cavity that allows air to enter the lungs.
∙ Bronchi are the air passages into the lungs.
∙ The alveoli are surrounded by tiny blood vessels, called capillaries. It is the alveoli that receive the oxygen and pass it on to the blood.
∙ Alveoli and capillaries both have very thin walls, which allow the oxygen to pass.
∙ Trachea, also called the windpipe, is a cartilaginous tube that connects the pharynx and larynx to the lungs.
∙ Nostril is either of the two external openings of the nasal cavity that allows air to enter the lungs.
∙ Bronchi are the air passages into the lungs.
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