Embryology

Question 1

The stage of lung maturation that takes place between 16-28 weeks’ gestation. It sees the branching of terminal bronchioles into respiratory bronchioles and finally alveolar ducts.

Answer 1

Canalicular

Question 2

The germ layer that forms the lining of the trachea and bronchial tree.

Answer 2

Endoderm

Question 3

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

Answer 3

Respiratory diverticulum

Question 4

The stage of lung maturation that takes place between 6-16 weeks’ gestation. It involves the development of multiple branches of the bronchial tree down to the level of the terminal bronchioles.

Answer 4

Pseudoglandular

Question 5

The stage of lung maturation that takes place between 26 days’ and 6 weeks’ gestation. It involves the first stages of lung development, and sees the formation of the lungs’ lobes and segments.

Answer 5

Embryonic

Question 6

The germ layer that forms the cartilage and smooth muscle in the thorax.

Answer 6

Visceral Mesoderm

Question 7

The stage of lung maturation that takes place between 28-36 weeks’ gestation. The terminal sacs form, and capillaries come into close contact with the alveoli ready for gas exchange.

Answer 7

Saccular

Question 8

The structure that is seen to develop by 28 days’ gestation, found inferior to the trachea.

Answer 8

Bronchial buds

Question 9

The stage of lung maturation that takes place between 36 weeks’ gestation and early childhood and involves further maturation of the alveoli.

Answer 9

Alveolar