embryology

Question 1

outline the stages of respiratory developement

Answer 1

embryonic 
pseudglandular 
canalicular 
saccular 
alveolar

Question 2

when is embryonic

Answer 2

26 days - 6 weeks

Question 3

embryonic

Answer 3

Respiratory diverticulum forms. Initial branching to give lungs., lobes and segments.

Question 4

what is Respiratory diverticulum

Answer 4

structure that develops on the anterior foregut and is the first respiratory structure to develop

Question 5

when is Pseudoglandular

Answer 5

6-16weeks

Question 6

Pseudoglandular

Answer 6

14 more generations of branching to give terminal bronchioles

Question 7

when is canalicular

Answer 7

16-28 weeks

Question 8

canalicular

Answer 8

Sees the branching of terminal bronchioles into respiratory bronchioles and finally alveolar ducts.

Question 9

what are bronchial buds

Answer 9

structure that is seen to develop by 28 days gestation, found inf to the trachea

Question 10

saccular time

Answer 10

28-36 weeks gestation

Question 11

saccular

Answer 11

terminal sacs form, capillaries come into close contact with the alveoli ready for gas exchange

Question 12

when is alveolar

Answer 12

between 36 weeks gestation and early childhood

Question 13

alveolar

Answer 13

further maturation of the alveoli

Question 14

endoderm

Answer 14

the erm layer that forms the lining of the trachea and the bronchial tree

Question 15

visceral mesoderm

Answer 15

germ layer that forms the cartilage and SM in the thorax

Question 16

what do the type 1 cells do

Answer 16

blood air barrier