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IUSM Anatomy KG > Lung Development > Flashcards

Flashcards in Lung Development Deck (17)
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1

The appearance of the ________ is the earliest indication of lung bud formation

laryngo-tracheal groove and tube

2

What gives rise to the larynx?

Most cranial portion of the laryngo-tacheal tube and the surrounding mesoderm

3

What are the epithelium and glands of the trachea derived from?

endoderm

4

What are the cartilage, connective tissue, and muscle surrounding the trachea derived from?

splanchnic mesoderm

5

What gives rise to the visceral pleura?

splanchnic mesoderm

6

What gives rise to the parietal pleura?

somatic mesoderm from body wall

7

In what lung development period do the lung buds resemble exocrine glands of cuboidal epithelium,
all elements are present by the end except repiratory surfaces
survival is not possible during this stage

pseudoglandular (5 - 17 weeks)

8

What lung development period
vascularization takes place
respiratory bronchioles develop by the end

canalicular period 16 - 25 weeks

9

What lung development period
respiratory epithelium matures
surfactant is present
terminal sacs develop

terminal sac period 24 weeks - 30

10

What is the lung development period?
alveoli form from terminal sacs

alveolar 30 - birth

11

What percent of alveoli are present at birth?

12 - 15%

12

Agenesis?

absence or failure to form

13

Fistula?

abnormal passage or connection between two internal organs

14

atresia

closure

15

stenosis

narrowing

16

What folds grow medially and fuse to separate the pleural cavities from the pericardial cavities?

Body wall folds
Pleuropericardial folds

17

What nerve becomes enmeshed within the pleuropericardial fold because it follows the early forming diaphram from the C3 - C5 region as it migrates caudally?

Phrenic nerve