Respiratory System Flashcards
What are the two parts of the respiratory tract?
lower
upper
What are the functions of the respiratory tract?
conduction of air (warms and humidifies)
respiration (gas exchange)
protection against pathogens (mucous)
What is the upper respiratory tract composed of?
nose, paranasal sinuses, mouth (including tonsils), pharynx, larynx
What is the bone in the midline of the nose?
vomer
What are the nostrils called anatomically?
nares
How to treat a nosebleed?
lean forward to avoid blood in stomach
Where do the nasolacrimal and paranasal sinus ducts open?
nasal cavity
What connective tissues make up the nasal septum?
hyaline cartilage and bone
What does the nasolacrimal duct link with?
the eyes causing tears to exit through nose
What is the lining of the external portion of nose?
skin stratified squamous keratinised epithelium with hair
What is the lining of the internal portion of the nose?
ciliated pseudostratified columnar epithelium with goblet cells
What is the lining of the olfactory segment of the nose?
ciliated pesudostratified columnar epithelium with goblet cells + olfactory receptors
Where is olfactory epithelium found in nasal cavity?
roof of nasal cavity - few cm posterior and superior to the nostrils
How do olfactory receptors work?
Olfactory receptors are able to detect air-borne odour molecules that enter the nasal cavity and bind to olfactory receptors. The activation of olfactory receptors results in olfactory receptor neurons sending an impulse to the brain’s olfactory system.
What is the role of the paranasal sinuses?
Lightening the weight of the head
Supporting immune defence of the nasal cavity
Humidifying inspired air
Voice resonance
What are the paranasal sinuses?
frontal sinuses
Sphenoid Sinuses
Ethmoidal Sinuses
maxillary sinuses
What are the paranasal sinuses named after?
the bone they are found in
What is a fistula?
an abnormal connection between two epithelium lined organs that do not connect
What is an oral-antral fistula?
an opening created between a paranasal sinus and the mouth
What are the three parts of the pharynx?
nasopharynx
oropharynx
laryngopharynx
What is the lower respiratory made of?
trachea, bronchi, bronchioles and alveoli
Where is sound generated (voice box)?
larynx
What vertebral region is the larynx?
cervical 3-6
What does the larynx do?
produces sound
protect the lower respiratory tract from aspirating food into the trachea while breathing.
Where does the adam’s apple sit?
thyroid cartilage
What does a large larynx correlate with?
a deeper voice
Why is the adam’s apple more prominent in males?
testosterone causes the cartilage to grow forward pulling the voice box with it
What are the true vocal cords lined with?
stratified squamous epithelium
What are the unpaired cartilages that make up the larynx skeleton?
the thyroid cartilage, cricoid cartilage, epiglottis,
What are the paired cartilages that make up the larynx skeleton?
arytenoid cartilages, corniculate cartilages, and cuneiform cartilages.
What is the largest cartilage in the larynx?
thyroid
What cartilage is attached to the vocal cords?
Arytenoid cartilages
What does cuneiform cartilage surround?
Aryepiglottic folds
What is hyoid bone?
Hyoid bone is the only bone of the body not connected to any others. It is horse-shoe shaped and found between the chin and the thyroid cartilage. It serves as an attachment of anterior neck muscles.