larynx
Anatomy of larynx
The larynx lies in front of the hypopharynx opposite the third to sixth cervical vertebrae. It moves vertically and in anteroposterior direction during swallowing and phonation. In an adult, the larynx ends at the lower border of C6 vertebra. It can also be passively moved from side to side producing a characteristic grating sensation called laryngeal crepitus. hypopharynx Anatomy of larynx
3 unpaired cartilage: Larngeal cartilages Larynx has 3 unpaired and 3 paired cartilage. Eepiglottis Thyroid Cricoid Anatomy of larynx Thyroid: it is the largest of all. Cricoid: it is the only cartilage forming a complete ring. Epiglottis: it is a leaf-like, yellow, elastic cartilage forming anterior wall of laryngeal inlet
3 paired cartilage: Arytenoid cartilage Corniculate cartilage Cuneiform cartilage Larngeal cartilages Larynx has 3 unpaired and 3 paired cartilage. Arytenoid Corniculate Anatomy of larynx
Laryngeal joints Cricoarytenoid joint Anatomy of larynx Cricothyroid joint
Muscles of larynx They are of two types: Anatomy of larynx intrinsic, which attach laryngeal cartilages to each other. extrinsic, which attach larynx to the surrounding structures
1.Intrinsic muscles: Muscles of larynx Intrinsic muscles Anatomy of larynx They may act on (a)Acting on vocal cords (b)Acting on laryngeal inlet
2.Extrinsic muscles: Muscles of larynx Extrinsic muscles Anatomy of larynx Elevators Depressors They connect the larynx to the neighbouring structures and are divided into elevators or depressors of larynx
Laryngeal cavity starts at the laryngeal inlet Cavity of the larynx laryngeal inlet cricoid cartilage Anatomy of larynx and ends at the lower border of cricoid cartilage