Respiratory Embryology

Question 1

what primitive structure does the central tendon form from?

Answer 1

septum transversum

Question 2

what primitive structure foes the primitive diaphragm form from?

Answer 2

pleuroperitoneal membranes

Question 3

what primitive structure does the visceral and parietal pleural form from?

Answer 3

visceral - lateral plate splanchic mesoderm

parietal - lateral plate somatic mesoderm

Question 4

what primitive structure is the crura of the diaphragm formed from?

Answer 4

dorsal mesenteries of oesophagus

Question 5

what primitive structure is the peripheral parts of the diaphragm formed from?

Answer 5

the muscular ingrowth from lateral body walls

Question 6

what primitive structure is the oesophagus , trachea and lungs formed from?

Answer 6

the ventral wall of foregut

Question 7

what does the pleuroperitoneal membranes form?

Answer 7

the primitive diaphragm

Question 8

what does the dorsal mesenteries of the oesophagus form?

Answer 8

the median portion and crura of diaphragm

Question 9

what separates the oesophagus from the trachea?

Answer 9

oesophagotracheal septum

Question 10

what does the lung bud begin as?

Answer 10

laryngeotracheal groove

Question 11

in the development of the pleurae, what is the gap between the two newely developed pleurae called?

Answer 11

pleuroperitoneal canals

Question 12

what separates the pleural cavity from the pericardial cavity?

Answer 12

pleuropericardial folds

Question 13

at what weeks is the pseudo glandular stage?

Answer 13

7-17 weeks

Question 14

at what weeks is the canicular stage?

Answer 14

17-27 weeks

Question 15

at what weeks is the saccular stage?

Answer 15

27-40 weeks

Question 16

at what weeks is the alveolar stage?

Answer 16

36 weeks to 8 years

Question 17

at what vertebral levels does the septum transversum originate?

Answer 17

C3,C4,C5