Nose & Nasal Cavity
what are the two regions of the nasal cavity and what are some defining features?
external nose - skeletal framework of bone and cartilage
nasal cavity - continuous posteriorly with nasopharynx
What is the pharynx:
muscular tube that....
connects nasal cavity & mouth superiorly to the larynx and esophagus inferiorly
what is the larynx function
1. provides a patent (open) airway
2. routes air & food into proper channels
3. voice production
what is contained in the vestibule?
vibrissae which filter coarse particles from inspired air
olfactory mucosa - which contain smell receptors
What are the three regions of the pharynx
1. nasopharynx
2. oropharynx
3. laryngopharynx
what is the epiglottis?
elastic cartilage; covers the laryngeal inlet during swallowing
what type of cells is the respiratory mucosa and what is some of its basic functions?
pseudostratified ciliated columnar epithelium
filter/cleanse incoming air, moistens & warm incoming air, rich wirh sensory nerve endings, cilia move contaminated mucus to throat
What is the nasopharynx? Lining? Special structures?
air way
pseudostratified columnar epithelium
soft palate and uvula which close during swallowing, pharynheal tonsil, & pharyngotympanic tubes
what is specific about the cricoid cartilage?
ring shaped
What are the functions of the nose and nasal cavity
1. Provides an airway for respiration
2. filters and cleans incoming air
3. moistens and warms incoming air
4. serves as a resonating chamber for speech
5. houses olfactory receptors
what is the oropharynx? Lining? special structures?
passageway for food and air
stratified squamous epithelium
isthmus of fauces (opening of oral cavity), palatine tonsils, lingual tonsil
what are some of the types of cartilage of larynx
hyaline, thyroid, cricoid, arytenoid, cuniform, corniculate, elastic
What are the nasal conchae and what is their function during inhalation and exhalation
scroll-like folds of bones that increase mucosal surface area and enhance air turbulence
during inhalation they filter, heat and moisten air
during exhalation they reclaim heat and moisture
what is the laryngopharynx? Lining?
passageway for food and air
stratified squamous epithelium
continuous with the esophagus
what is the different of vocal folds and vestibular folds?
vocal folds - true vocal cords, contain elastic fibers, opening between glottis, folds vibrate to produce sounds as air rushes up from the lungs
vestibular folds - false vocal cords, no part in sound production, helps close glottis during swallowing