Session 1 Flashcards
Where are the lungs located
Thoracic cavity
Difference between between respiratory zone and the conducting zone
Respiratory zone - involved in gaseous exchange
Conducting zone - forms continuous passage for air to move through lungs
3 examples of respiratory zone structures
- bronchioles
- alveoli
- alveolar ducts
5 examples of conducting zone structures
- nose
- pharynx
- larynx
- bronchi
- bronchioles
Difference between upper and lower respiratory tracts
- Upper
Consists of structures in head and neck - Lower
Consists of structures located in the chest
Why is the right lung heavier and larger than the left lung
Left lung needs to leave room for the heart
How many lobes does each lung have and what separates each lobe
Right - 3
Left - 2
Fissures
How many fissures does each lobe have
Right - 2; 1 oblique 1 horizontal
Left - 1 oblique
The 2 pleural sacs of the lungs and what lies between them
- costal pleura
- visceral pleura
-pleural cavity
Describe the mechanism of breathing
Inspiration
- intrapulmonary volume increases as intercostals constricts and diaphragm descends
- intrapulmonary pressure decreases by 1mmHG
- air moves into lungs
Expiration
- diaphragm and intercostals relax
- intrapulmonary volume decreases and intrapulmonary pressure increases back to 761mmHG 1 above the atmospheric pressure so gas can mov back out
Average Respiration Rate
12-16 breaths per mins
What is clubbing
Reduced angle between nail and nail bed
