Topic 4 - The Respiratory System Flashcards
1
Q
what is the thorax?
A
the top part of your body
2
Q
what separates the thorax from the lower part of the body?
A
the diaphragm
3
Q
what surrounds the lungs?
A
the pleural membranes, which are surrounded by the ribcage and intercostal muscles
4
Q
when air is breathed in what does it go through first?
A
the trachea
5
Q
what happens at the end of the trachea?
A
the trachea splits into two tubes called bronchi, going to each lung
6
Q
what happens at the end of the bronchi?
A
the bronchi split into smaller tubes called bronchioles
7
Q
what happens at the end of the bronchioles?
A
bronchioles end at the alveoli
8
Q
what happens when breathing in?
A
- intercostal muscles and diaphragm contracts
- thorax volume increases
- this decreases pressure, drawing air in
9
Q
what happens when breathing out?
A
- intercostal muscles and diaphragm relax
- thorax volume decreases
- this increases pressure, forcing air out
