The tracheo-brachial tree

Question 0

What is the tree made up of?

Answer 0

C shaped rings of hyaline cartilage with an electric membranous smooth muscle completely the circle posterior you which the oesophagus can push into during swallowing

Question 1

Where does the tree begin?

Answer 1

Immediately after the cricoid cartilage

Question 2

What is the carina?

Answer 2

The thickened bit of cartilage where the tree branches into the left and right primary bronchi

Question 3

Why is the right primary bronchi the path of least resistance?

Answer 3

Because the left has to go under the aorta so has to bend more and is longer

Question 4

What is the order of branching of the tree?

Answer 4

Trachea > primary bronchi > secondary bronchi > tertiary bronchi > bronchioles > terminal bronchioles > respiratory bronchioles > alveoli

Question 5

Describe the secondary bronchi?

Answer 5

They usually supply a single lobe of the lungs

Question 6

Describe the tertiary bronchi?

Answer 6

Supply a distinct bronchopulmonary segment

Question 7

Describe the terminal bronchioles.

Answer 7

Supply individual pulmonary lobes which in turn consist of several respiratory bronchioles

Question 8

Describe the respiratory bronchioles

Answer 8

Connect to alveolar sacs by alveolar ducts and each sac connects to multiple alveoli

Question 9

Describe the alveoli

Answer 9

Each has its own capillary network which receives deoxygenated blood to be oxygenated