Resp embryology

Question 1

what are the stages of lung development/maturation?

Answer 1

ELEPHANTS PLAY CHESS in SUNNY AFRICA
Embryonic
Pseudoglandular
Cannicular
Saccular
Alveolar

Question 2

describe the embryonic phase

Answer 2

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

Question 3

describe the pseudoglandular phase

Answer 3

more branching
formation of terminal brocnhioles
6-16 weeks

Question 4

describe the cannicular phase

Answer 4

resp bronchioles and alveolar ducts begin to form

16-28 weeks

Question 5

describe the saccular phase

Answer 5

terminal sacs form

28-36 weeks

Question 6

describe the alveolar phase

Answer 6

alveoli mature

36 weeks-early childhood

Question 7

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

Answer 7

endoderm

Question 8

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

Answer 8

visceral mesoderm

Question 9

where does the lung bud develop from and why?

Answer 9

from foregut

oesophagus and trachea from from same tube then split into 2

Question 10

what is oesophageal atresia?

Answer 10

blind ending

oesophagus splits, fuses to and is blocked by trachea

Question 11

what is tracheoesophagel fistula?

Answer 11

communication between oesophagus and trachea