Chapter 17 Flashcards Preview

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Flashcards in Chapter 17 Deck (29):
1

Epiglottis

Flap that covers larynx during swallowing

2

Pleural sac

Double membrane surrounding lungs

3

Diaphragm

Large flat muscle that expands lungs by contracting

4

External intercostals

Expand lungs

5

Internal intercostals

Externals antagonists

6

Scalenes

Expand lungs

7

Pharynx

Common passageway for digestion and respiration.

8

Larynx

Opening of respiratory tract, contains vocal cords

9

Nose

Warms and humidifies air

10

Trachea

Passageway from larynx to bronchi

11

Primary bronchi

2 primary bronchi, 1 to each lung

12

Bronchioles

Small collapsible passageways of smooth muscles leading to lungs

13

Type 1 alveoli

1-cell thick gas exchangers, 95% of alveolar cells

14

Type 2 alveoli

Synthesizes surfactant

15

Surfactant

Chemical that aids lungs during expansion

16

Boyle's Law

Pressure inverse to volume, P1V1=P2V2

17

Tidal Volume (Vt)

Air inspirated or expirated during a regular breath

18

Inspiratory reserve volume (IRV)

Additional volume that can be inspirated after tidal

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Expiratory reserve volume (ERV)

Air that can be forcefully exhaled after tidal

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Residual volume (RV)

Air left in system always

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Vital Capacity (VC)

ERV+IRV+Vt; max air moved with one breath

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Total lung capacity

ERV+IRV+Vt+RV; whole capacity of lungs

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Inspiratory capacity

IRV+Vt

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Functional residual capacity

ERV+RV

25

Pneumothorax

Lung collapse due to breaking of pleural fluid bond

26

Total pulmonary ventilation

Ventilation rate X Vt; air moved per min

27

Alveolar ventilation

Ventilation rate X (Vt-V dead space) ; fresh air reaching new alveoli

28

Anatomic dead space

Volume in respiratory passages where air isn't exchanged

29

Alveoli

Sacs that exchange air in lungs