The Breathing System Flashcards
1
Q
Where are the lungs?
A
The lungs are in the thorax.
2
Q
Where does the air go after you breath it in?
A
It goes through the trachea, which splits into two tubes called the bronchi, which split into bronchioles, which end in bags called aveoli where gas exchange takes place.
3
Q
How does breathing in occur?
A
Intercostal muscles in the diaphragm contract, so the thorax volume increases. This decreases the pressure, so air is drawn in.
4
Q
How does breathing out occur?
A
Intercostal muscles and diaphragm relax, so the thorax volume decreases. This increases the pressure, so air is forced forced out.
5
Q
What is the term for breathing in and out?
A
Ventilation is breathing in and out.
