the lungs & the pleura Flashcards

1
Q

what does the left pleural cavity contain?

A

the left lung

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2
Q

what does the right pleural cavity contain?

A

the right lung

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3
Q

what does the mediastinum contain?

A

the trachea, the heart, the oesophagus, blood vessels & nerves

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4
Q

in which weeks does the respiratory system begin to develop?

A

4-6 weeks

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5
Q

what layer does the respiratory system develop from?

A

the endoderm layer

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6
Q

what forms from endodermal out pouches?

A

lung buds & bronchial buds

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7
Q

what are the 2 layers of pleura surrounding the lungs?

A

the visceral pleura & the parietal pleura

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8
Q

where does the visceral pleura attach?

A

connects to the parietal pleura & the hilum/root of the lung

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9
Q

where is the parietal pleura found?

A

it lines the internal aspect of the thoracic wall

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10
Q

what are the 4 parts that the parietal pleura is divided into?

A
  • costal
  • mediastinal
  • diaphragmatic
  • cervical
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11
Q

what is the pleural cavity?

A

the space between the 2 layers of pleura

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12
Q

what does the pleural cavity contain?

A

serous fluid

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13
Q

what holds the lungs against the thoracic wall?

A

the surface tension of the serous fluid

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14
Q

what are the 4 parietal pleural innervations?

A
  • cervical: 1st intercostal nerve
  • costal: intercostal nerves
  • mediastinal: phrenic nerve
  • diaphragmatic: lower intercostals & phrenic nerves
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15
Q

what is the visceral pleural innervation?

A

autonomic (sympathetic & parasympathetic) form pulmonary plexuses

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16
Q

how many lobes does the left & right lung have?

A

left: 2 lobes
right: 3 lobes

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17
Q

what fissure is present in the left lung?

A

oblique fissure

18
Q

what fissure is present in the right lung?

A

horizontal & oblique fissure

19
Q

what are the lobes in the left lung?

A

superior & inferior

20
Q

what are the lobes in the right lung?

A

superior, middle & inferior

21
Q

what are the 3 surfaces of the lungs?

A

costal, mediastinal & diaphragmatic

22
Q

what are the 3 borders of the lungs?

A

anterior, inferior & posterior

23
Q

where do the left arteries branch from?

A

descending aorta

24
Q

where do the right arteries branch from?

A

intercostal arteries

25
Q

where do bronchial veins terminate?

A

in the azygos system of veins

26
Q

where does the innervation of the lungs come from?

A

the autonomic nervous system (ANS)

27
Q

where is the innervation of the sympathetic nervous system & what happens to bronchial musculature & pulmonary vasculature?

A
  • sympathetic trunk
  • bronchial musculature: dilates
  • pulmonary vasculature: constricts
28
Q

where is the innervation of the parasympathetic nervous system & what happens to bronchial musculature & pulmonary vasculature?

A
  • from vagus
  • bronchial musculature: constricts
  • pulmonary vasculature: dilates
29
Q

what is the order of the respiratory tree?

A

trachea –> primary (main) bronchi –> secondary (lobar) bronchi –> tertiary (segmental) bronchi –> bronchioles (termninal/respiratory) –> alveorlar sacs –> alveoli

30
Q

where does the trachea run from & to?

A

C6 to T4/5

31
Q

what is the name of the cartilage that separates the 2 main bronchi when they bifurcate?

A

the carina

32
Q

where does the trachea bifurcate?

A

the sternal angle

33
Q

what lines the trachea?

A

mucous membrane & cilia

34
Q

where do the primary bronchi pass into the lungs?

A

the hilum/root of the lung

35
Q

what is the difference between the left & right bronchus?

A

main right bronchus is wider, shorter & runs more vertically

36
Q

how many secondary bronchi are in each lung?

A

3 in right lung & 2 in left

37
Q

what does each tertiary bronchi supply?

A

a bronchopulmonary segment

38
Q

how many bronchopulmonary segments are there in the left & right lung?

A

10 in right lung & 8-10 in left lung

39
Q

what are the 2 cell types in alveoli?

A
  • type 1 pneumocytes (95%)

- type 2 pneumocytes (5%)

40
Q

what do type 2 pneumocytes do?

A

secrete pulmonary surfactant

41
Q

where is the visceral pleura found?

A

lines the lungs