1. Laryngology

2. Review Anatomy Physiologic functions:
Respiration; Pronunciation; Protection; Swallowing
Characteristics of the children
Symptoms:
1）hoarseness
2）inspiratory dyspnea
3）laryngeal stridor
4）pain of the larynx
5）hemoptysis

7. Laryngeal muscles Extrinsic laryngeal muscles
Up：geniohyoideus; digastricus; mylohyoideus
Down：sternothyreoideus; sternohyoideus; omohyoideus
Intrinsic laryngeal muscles:
abductor：posterior cricoarytenoid musle
adductor：lateral cricoarytenoid musle,arytenoid musle
tensor：cricothyroid musle
relaxer：thyroarytenoid musle
Main components of the vocal cords：
thyroarytenoid musle, vocal ligament, mucosa

13. The lymphatic drainage of the larynx
Supraglottic region： rich lymphatic vessels
aryepiglottic folds anterior of sinus piriformisthyrohyoid membranecarotid bifuracation
Infraglottic region： less lymphatic vessels
across the cricothyroid membraneprelaryngeal, para tracheal inferior deep cervical lymph nodes
Glottic portion： rare lymphatic vessels

16. Laryngeal nerve internus sensory nerve
superior externus motor nerve(cricothyroid musle)
vagus { left longer
recurrent right motor nerve
(all the intrinsic laryngeal muscles except cricothyroid musle)

18. normal