Unit 5 Gas Exchanging & Breathing Flashcards
1
Q
Thoracic Cage Components
A
- Sternum
- Ribs
- Costal cartilage
- Thoracic vertebrae
2
Q
Anterior Costal Cartilage
A
- Join ribs at sternum
3
Q
Posterior Costal Cartilage
A
- Joins vertebrae
- Forms costotransverse joint
- Forms costovertebral joints
4
Q
Costotransverse Joint
A
- Costal tubercle & transverse process of thoracic vertebrae
5
Q
Costovertebral Joint
A
- Head of rib & vertebral body
6
Q
Thoracic Muscles
A
- External intercostals
- Internal & innermost intercostals
- Diaphragm
7
Q
External Intercostals
A
- Inspiration
- Elevate ribs
- Superolateral to inferomedial ‘hands in pocket’
8
Q
Internal & Innermost Intercostals
A
- Forced expiration
- Depress rib
- Superomedial to inferolateral ‘grab collarbone’
9
Q
Diaphragm
A
- Inspiration
- Contract = lowering
- Increase volume of thoracic cavity
10
Q
Breathing
A
- Pressure change
- Dependant on thoracic cage volume
11
Q
Lung Tension
A
- Naturally want to collapse
- Stuck to visceral pleura
- Interstitium primary elastic
12
Q
Pleura
A
- Parietal & visceral layers create sac
- Decreases intrapleural pressure
- Decreases alveolar pressure
13
Q
Pneumothorax
A
- Puncture to pleural membrane
- Air in pleural space
14
Q
Pneumothorax Pressure Change
A
- Intrapleural = atmospheric pressure
- Lung no longer under tension
- Collapses
15
Q
Hemothorax
A
- Blood involved in pneumothorax
