Development of the respiratory system

Question 1

What does the respiratory system develop from?

Answer 1

Pharynx

Question 2

How does the respiratory system develop from the pharynx?

Answer 2

Anterior side of pharynx

diverticulum from pharynx

Question 3

What happens to the diverticulum of the pharynx in respiratory system development?

Answer 3

Diverticulum elongates downwards, forming trachea
splits it into two, forming two main bronchi
these continue to split, forming branches

Question 4

Why is the diaphragm innervated by nerves from the neck?

Answer 4

Because it developed in the neck

then migrated downwards and took its nerve supply with it