Larynx

Question 1

Larynx

Answer 1

Air tube belonging to respiratory system

Question 2

Extent

Answer 2

Extending from tongue root and epiglottis upper border (C3 vertebra) to cricoid cartilage lower border (C6 vertebra)

Question 3

Skeleton

Answer 3

Consists of 9 cartilages (3 single and 3 paired) connected by ligaments, membranes, and folds

Question 4

Nerve supply

Answer 4

1. Recurrent laryngeal nerve
2. Superior laryngeal nerve

Question 5

Recurrent laryngeal nerve

Answer 5

Motor: all muscles except cricothyroid
Sensory: mucosa below vocal cords

Question 6

Superior laryngeal nerve

Answer 6

Divides into:
1. External laryngeal nerve: supplies circothyroid muscle
2. Internal laryngeal nerve:
- pierces thyrohyoid membrane
- supplies mucosa above vocal cords and epiglottis

Question 7

Blood supply

Answer 7

1. Superior laryngeal artery
2. Inferior laryngeal artery

Question 8

Superior laryngeal artery

Answer 8

1. Arises from superior thyroid artery
2. Pierces thyrohyoid membrane with internal laryngeal nerve
3. Supply larynx upper part

Question 9

Inferior laryngeal artery

Answer 9

1. Arises from inferior artery
2. Ascends with recurrent laryngeal nerve below inferior constrictor lower border
3. Supply larynx lower part