II. Below is the step-by-step path of air through the respiratory system, but the steps are not in correct sequence. Put them in order, numbering them from 1 to 8.
Air enters the alveoli.
Carbon dioxide passes out of the blood stream, and is eventually exhaled.
Cilia and mucus trap tiny particles found in the air, and warm and moisten the air.
Air moves through smaller and smaller passageways called bronchi.
The trachea, or windpipe, then carries the air to the lungs.
Air enters the nose.
Oxygen passes into the blood stream.
Air moves down the throat, or pharynx.
Air enters the alveoli.
Carbon dioxide passes out of the blood stream, and is eventually exhaled.
Cilia and mucus trap tiny particles found in the air, and warm and moisten the air.
Air moves through smaller and smaller passageways called bronchi.
The trachea, or windpipe, then carries the air to the lungs.
Air enters the nose.
Oxygen passes into the blood stream.
Air moves down the throat, or pharynx.
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Answer:
3
8
4
6
5
1
7
2
Explanation:
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