respiratory tract Flashcards
what are the 2 components of the respiratory tract?
upper and lower
what are the components of the URT
nose, paranasal sinuses, mouth, pharynx, larynx
what is the external portion of the nose composed of?
skin, hyaline cartilage, muscle, bone, lined by mucous membranes
what is the interior portion of the nose called?
nasal cavity
where is the nasal cavity in relation to the nose?
superior and posterior
where is the nasal cavity in relation to the cranial fossa?
inferior and anterior
what ducts open in the nasal cavity?
from paranasal sinuses, as well as nasolacrimal duct
what is the respiratory segment made of?
ciliated pseudostratified columnar epithelium
what is the olfactory segment made of?
ciliated pseudostratified columnar epithelium and olfactory receptors
what are the functions of the nose?
warm and humidify air, sense of smell, paranasal sinuses responsible for vocal resonance and modification of speech
what are paranasal sinuses?
air filled spaced within the bones of the skull and face
what is an oral-antral fistula?
abnormal communication between 2 epithelium lined surfaces eg paranasal sinus and mouth
what are the components of the LRT?
larynx, trachea, bronchi, lungs, blood-air barrier
what is the larynx
voice box, c3-6, acts as a sphincter, sound generated here
what is unique about cricoid cartilage?
it forms a whole circle
