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Flashcards in Resp embryology Deck (11)
1

what are the stages of lung development/maturation?

ELEPHANTS PLAY CHESS in SUNNY AFRICA
Embryonic
Pseudoglandular
Cannicular
Saccular
Alveolar

2

describe the embryonic phase

involves the first stages of lung development, and sees the formation of the lungs' lobes and segments.
respiratory diverticulum forms, including branches
26 days - 6 weeks

3

describe the pseudoglandular phase

more branching
formation of terminal brocnhioles
6-16 weeks

4

describe the cannicular phase

resp bronchioles and alveolar ducts begin to form
16-28 weeks

5

describe the saccular phase

terminal sacs form
28-36 weeks

6

describe the alveolar phase

alveoli mature
36 weeks-early childhood

7

which germ layer forms the lining of trachea and bronchial tree?

endoderm

8

which germ layer forms all other lung tissue apart from lining of trachea and bronchial tree?

visceral mesoderm

9

where does the lung bud develop from and why?

from foregut
oesophagus and trachea from from same tube then split into 2

10

what is oesophageal atresia?

blind ending
oesophagus splits, fuses to and is blocked by trachea

11

what is tracheoesophagel fistula?

communication between oesophagus and trachea