Exchange surfaces Flashcards
Vital capacity (2)
- Maximum volume of air inhaled/ exhaled in one breath
- tidal volume + IRV + ERV
Residual volume
- amount of gas remaining in lungs after expiration
- 20% of lung capacity
Tidal volume
- amount of gas inspired and expired during normal breathing
- 7-8% of TLC
Inspiratory reserve volume
Gas inhaled above tidal inspiration (above normal breathing)
60% TLC
Expiration reserve volume
Exhaled beyond tidal capacity
Equation for VC
- TV + IRV + ERV
Features of the Trachea (6)
Hyaline cartilage (incomplete, c-shaped rings)
Smooth muscle
Elastic fibres
Cliated epithelium
Goblet cells
Mucous glands
Features of alveoli (5)
Elastic fibres
Provides larger surface area
Thin layer of squamous epithelium allows quick diffusion
Network of capillaries for good blood supply and maintains steep conc.grad
Lung surfactant to maintain inflation at inner surface and elasticity.
Features of the larger bronchioles (4)
Smooth muscle: constriction
Elastic fibres
Ciliated epithelium
Goblet cells
What parts of the lungs contain cartilage (2)
Trachea
Bronchi
Features of bronchi (6)
Cartilage
Smooth muscle
Elastic fibres
Ciliated epithelium
Goblet cells
Mucous glands
Features of smaller Bronchioles (2)
- smooth muscle
- elastic fibres
Lung features with smooth muscle (4)
Teaches
Bronchi
Larger bronchioles
Smaller bronchioles
Features of smallest bronchioles
Elastic fibres
What structures contain elastic fibres
All of them
Name all 6
Describe function of cartilage (5)
- connective tissue
- supports and gives strength to trachea and bronchi
- flexible
- resistant tension and compression
- Holds airway open
What structures contain mucous glands (2)
Trachea
bronchi
What structures contain goblet cells (3)
Trachea
Bronchi
Larger bronchioles