L52 Embryo Respiratory

Question 1

Week 4

Answer 1

Respiratory diverticulum

Question 2

Inner inng of larynx trachea, bronchi, lungs origin

Answer 2

Endoderm

Question 3

Cartilagninous, muscular, CT components of trachea and lungs origin

Answer 3

Splanchnic mesoderm

Question 4

Respiratory diverticulm maintains communication with pharynx thru

Answer 4

laryngeal orifice

Question 5

Abnormalities in partitioning of esophagus and trachea result in

Answer 5

esophogeal atresia w/ or w/o

Tracheoesophageal fistulas

Question 6

Laryngeal cartilages and musculature arise from what pharyngeal arches?

Answer 6

4 and 6

Question 7

Epiglottis forms from

Answer 7

mesenchyme of caudal hypopharyngeal eminence

Question 8

4 and 6 form

Answer 8

thyroid cartilage
Crycoid cartilage
Arytenoid cartilage

Question 9

Day 28

Answer 9

Lung bud divides to form 2 primary bronchial buds

Question 10

Day 30

Answer 10

Right forms 3 secondary bronchial buds

Left form 2 secondary bronchial buds

Question 11

Day 38

Answer 11

Right forms 10 tertiary bronchial buds

Left forms 8 tertiary bronchial buds

Question 12

Visceral pleura arises from

Parietal pleura arises from

Answer 12

Visceral: splanchnic mesoderm
Parietal: somatic mesoderm

Question 13

Respiratory bronchioles come at

Answer 13

16-28 weeeks

Question 14

Terminal sacs come at

Answer 14

week 36

Question 15

Weeks 5-16

Answer 15

Pseudograndular period

Question 16

Weeks 16-26

Answer 16

Canalicular period

Question 17

Weeks 26-birth

Answer 17

Terminal sac period

Question 18

Lining of terminal sac walls

Answer 18

simple squamous cells

Type I alveolar

Question 19

Function of type II alveolar cells

Answer 19

produce, store, secrete pulmonary surfactant

Question 20

Production of surfactant begins at

Answer 20

week 20-22