| the respatory system |
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Which two structures does the trachea lead to in the lungs?
The windpipe (trachea)
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What are the tiny air sacs in the lungs called?
When you breathe, air travels to your lungs through airways called bronchi.
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When we inhale (breathe in), what happens to the pressure in the thorax?
During the process of inhalation, the lung volume expands as a result of the contraction of the diaphragm
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What happens when we exhale (breathe out)? ...
When you breathe out, or exhale, your diaphragm and rib muscles relax, reducing the space in the chest cavity. As the chest cavity gets smaller, your lungs deflate, similar to releasing of air from a balloon.
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During exercise, what happens to breathing in humans?
When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide.
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