What are the movements involved in breathing in and breathing out?

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The lungs are the organs which your body uses to breath.

diaphram and tracia Also the rib muscle

The diaphragm is involved in breathing; it is enclosed in the rib structure.When one inhales: volume increases and the pressure decreases (diaphragm moves down)When one exhales: volume decreases and...

Nicotine is the addictive substance found in tobacco. Judging from your vague question- Nicotine is inhaled by the user and that of the smoking affects others as well.