HUMAN BREATHING SYSTEM Flashcards
1
Q
Thorax
A
- airtight compartment where lungs are enclosed
2
Q
Pleural membranes (2)
A
- line thorax and cover lungs
- fluid between membranes prevents friction between lungs & chest cavity
3
Q
Diaphragm (2)
A
- dome-shaped muscle at base of thorax
- separates thorax and abdomen
4
Q
Ribs
A
- surround thorax
5
Q
Intercostal muscles
A
- between ribs
6
Q
Trachea
A
- flexible airway to lungs
7
Q
Bronchi
A
- branches of trachea
8
Q
Bronchioles
A
- branching network of tubes from lungs
9
Q
Alveoli
A
- air sacs at the end of the bronchioles
10
Q
Ventilation & mneumonic
A
- pressure breathing
- Intercostal muscles Ribs Diaphragm Thorax Lungs Pressure
- Inquisitive manic raccoon destroys their lungs
11
Q
Inspiration (6)
A
- Intercostal muscles contract
- Ribs rise upwards and outwards
- Diaphragm contracts and flattens
- Thorax volume increases
- Lung pressure decreases
- Outside > inside pressure therefore air is forced in.
12
Q
Expiration (6)
A
- Intercostal muscles relax
- Ribs move downwards and inwards
- Diaphragm relaxes and domes upwards
- Thorax volume decreases
- Lung pressure increases
- Inside > outside pressure therefore air is forced out.
13
Q
Lung tissue (2)
A
- Elastic
- recoil and regain shape when not expanded
14
Q
Pleural fluid (2)
A
- surrounds lungs and lines thorax
- acts as a lubricant, prevents friction
15
Q
aveoli surfectant
A
- anti-sticking mixture
- low surface tension
- allows gases to dissolve before diffusion
