respiratory system part 1 Flashcards
what are the 5 functions of the respiratory system
o2 in c02 out
regulate blood ph
smell
produce sound
elimination of some water and heat
what is in the upper portion of the respiratory system
nose
pharynx
what is in the lower portion of the respiratory system
larynx
trachea
bronchi/ lungs
what are the two external portions of the nose called
nostrils
what does the external portion of the nose conclude
cartilage covered in skin and lined with a mucous membrane
what divides the nose
septum
what are the functions of the nose
warms, filters moistens air
smell
2 functions of the pharynx
passageway for air and food
resonating chamber for speech sounds
where does the pharynx start
starts at the internal nares and extends part way down the neck
what does the larynx connect
pharynx and trachea
how many pieces of cartilage does the larynx have
9
what is the epiglottis
leaf-shaped piece of cartilage that lies on top of larynx
what does the epiglottis do
moves up and dow like trap door
function of epiglottis
prevents food entering lungs
what is the trachea a passage way for
air located in the front of the oesophagus
what is the structure of the trachea
walls lines with mucous membrane supported by c-shaped rings of cartilage
where does the lungs lie and attached to
in the thoracic cavity and diaphragm
function of pleural cavity
contains lubricating fluid secreted by membranes
what does the liquid in the pleural cavity do
reduces friction and allows them to move easily during breathing
what is the branching of the bronchial tree
trachea
primary bronchus
secondary bronchi
tertiary bronchi
bronchioles
terminal bronchioles
alveoli
what surrounds alveolar ducts
numerous alveoli and alveolar sacs
what do alveolar macrophages do
remove debris from alveolar spaces
what’s around the alveolus
primary arteriole and venal that form blood capillary network
