Embryology

Question 1

Trachea and bronchial tree is derived from the ___derm

Answer 1

endoderm

Question 2

Lung buds off of the ___

Answer 2

gut tube

Question 3

Lung tissue other than trachea and bronchial tree is derived from ____ derm

Answer 3

mesoderm

Question 4

Congenital defects of lung and respiratory tree

Answer 4

tracheoesophageal fistula

oesophageal atresia

Question 5

Maturation of the lung stage 1st to 5th

Answer 5

Embryonic
Pseudoglandular
Canalicular
Saccular
Alveolar
(Every Person Can Stomach Air)

Question 6

Embryonic stage of lung development is at ___

Involves ___

Answer 6

26 days to 6wks

Respiratory diverticulum forma -> branching of lungs, lobes and segments

Question 7

Pseudoglandular phase of lung development is at ___

Involves ___

Answer 7

6-16 wks

Branching x14 = terminal bronchioles

Question 8

Canalicular stage of lung development is at ___

Involves ____

Answer 8

16-28wks

Terminal -> >=2 respiratory bronchioles -> 3-6 alveolar ducts

Question 9

Saccular stage of lung development is at ___

Involves ___

Answer 9

28wks to 36wks

terminal sacs form and capillaries establish close contact

Question 10

Alveolar stage of lung development is at ___

Involves _____

Answer 10

36 wks to early childhood

alveoli cells mature Type 2 = surfactant