Thorax -> Upper part of the body
Diaphragm seperates the THORAX from the lower part.
Air comes in through the Trachea, and then into the bronchi, which seperates into two tubes, each called the bronchus. One bronchus goes into one lung each, where it seperates into little bronchioles. They have alveoli on the end of them. Which are little air sacs where gaseous exchange takes place.
BREATHING IN:
- Intercostal muscles and diaphragm contract
- Thorax volume increases
- Pressure is increased and air is breathed in
BREATHING OUT:
- Intercostal muscles and diaphragm relax
- Thorax volume decreases
- Air is forced out
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