The Respiratory System

Question 1

What is the function of the epiglottis?

Answer 1

When swallowing food, the epiglottis folds backwards to cover the larynx opening and the food enters the oesophagus

Question 2

At which vertebral level does the trachea bifurcate?

Answer 2

L4

Question 3

What does the trachea bifurcate into?

Answer 3

The right and left principal bronchi. The right principal bronchi is shorter, wider and more straight than the left (which curves obliquely). Food is more likely to go down right bronchi

Question 4

Why are the tracheal cartilages incomplete posteriorly where the oesophagus?

Answer 4

Because the oesophagus is constantly contracting (peristalsis)

Question 5

How many lobes are there in the right lung?

Answer 5

3 (superior, middle and inferior lobes)

Question 6

How many lobes are there in the left lung?

Answer 6

2 (superior and inferior lobes)

Question 7

How many fissures are there in the right lung?

Answer 7

2 (oblique and horizontal fissures)

Question 8

How many fissures are there in the left lung?

Answer 8

1 (oblique fissure)

Question 9

Divisions of Pharynx(throat):
___ is posterior to the ___
___ is posterior to the ___
___ is posterior to the ___

Answer 9

Nasopharynx, nasal cavity
Oropharynx, oral cavity
Laryngopharynx, larynx