What is the only floating bone in body besides patella (knee cap)?
Hyoid Bone
What is the leaf-like cartilage that acts as a protective structure when it inverts to cover the laryngeal opening during swallowing?
Epiglottis
What is the largest of the laryngeal cartilages?
Thyroid Cartilage
What ride on the high-backed upper surface of the cricoid cartilage, forming the posterior point of attachment for the vocal folds?
Arytenoid cartilages
What sit at the apex of the arytenoid cartilages, horn-like shaped?
Corniculate cartilages
What are paired wedge-shaped rods embedded within the aryepiglottic folds
Cuneiform Cartilages
What is the complete ring sitting on top of the trachea, on lateral view it gives the appearance of a signet ring (back arches up relative to the front)?
Cricoid cartilage
Name the 3 parts of the hyoid bone.
- Greater horns
- Lesser horns
- Corpus (body)
What do the 2 vocal processes on the arytenoids connect to?
Thyromuscularis and Thyrovocalis muscles
Name the 5 layers of the vocal folds
1. Epithelium-Thin sheet of squamous (Lamina Propria-which is comprised of three different tissues) 2. Superfical Layer 3. Intermediate Layer 4. Deep Layer 5. Thyroarytenoid muscle
What are the ventricular folds?
a. k.a. false (vocal) folds, vestibular folds
- thick folds of mucous membrane
- above true vocal folds
- not used in normal phonation
What 4 functions of the larynx are there?
- RESPIRATION = breathing for life (open glottis)
- PROTECTION with cough reflex: Close, then open glottis with help of respiratory system
- PROTECTION during swallowing: Close glottis with help of respiratory system
- PHONATION with voice: Close/open
glottis and adjust vocal fold tension
What 3 planes does the rib cage move on inspiration?
- Vertical dimension is increased by the contraction of the dome-shaped diaphragm.
- Transverse (side to side) dimension is increased by raising of the curved ribs.
- Anterior-posterior dimension is increased by simultaneous forward and upward movement of the sternum.
