Ch. 24 Flashcards
respiratory system provides extensive area for gas exchange between
air and blood
respiratory system moves air to/from exchange
surfaces in lungs
respiratory system protects surfaces from
dehydration and environment changes
respiratory system defends against
invasion by pathogenic microbes
respiratory system produces sounds involved with
speaking, singing, and non verbal communication
respiratory system assists in regulation of blood
volume, pressure, and pH
ventilation is
air exchange
nasal cavity helps
protect from machrophages coming in
respiratory system is also connected to the
nervous system
respiratory system divided to
upper and lower
larynx seperates
upper and lower
what area does respiratory epithelium NOT line
inferior pharynx, small passages in lungs bronchioles or alveoli
respiratory epithelium type
pseudostratified ciliated columnar epithelium with mucuous cells and glands
mucus traps
debris and microbes
what sweep mucus and anything to trap it toward pharynx
cillia
nose functions
moisten, warms, filters
chamber for speech
site of olfaction
nostrils are called
nares
bridge of nose called
dorsum
ale and apex supported by cartilages and other connective tissues
nares/nostrils
bridge is supported by
nasal bones superiorly and cartilages inferiorly
nasal septum formed by
carilage and vomer
perpendicular plate
vibrissae are
coarse hair in our nose
nasal cavity bordered by
cribiform plate and palate
olfactory region in nose is in the
superior portion
conchae increase
mucosal surface area
warm, moisten, filter
posterior nasal apertures connect
nasal cavity into pharnyx
pharynx is often called
throat
nasopharynx is the first area and houses
tonsil, eustachian tubes
soft plate and uvula
oropharynx bounded by
palate arches
oropharynx houses
palatine and lingual tonsils
laryngopharynx is posterior to the
epiglottis
laryngopharynx allows
passage of air and food
laryngopharynx ends at
junction between esophagus and larynx
oropharynx epithelium
stratified squamous epithelium
order of pharnx
nasopharnx
oropharynx
laryngopharynx
larynx is located at
adams apple
glottis is an
opening
epiglottis sits
on the glottis to close it
adams apple is technically
thryoid cartilagge
circoid cartilage is below
thyroid cartilage
ring shape
arytenoid cartilages in voice box help
support vocal cords/folds
intrinsic laryngeal muscles regulate
tension in coval cords
intrinsic laryngeal muscles opens/closes
glottis
extrinsic laryngeal muscles position
and stabilize the larynx
extrinsic laryngeal muscles elevate
larynx during swallowing
trachea connects to the
main bronchi
main bronchi split into
lobar secondary bronchi
lobar secondary bronchi lobe amounts
Right: 3
left: 2
bronchioles are more
smooth muscles
first bronchioles you encounter are
terminal bronchioles
each air sac is called
alveolus
large clusters of alveolus are
alveolar sacs
alveolar ducts connect
alevolar sacs together
connect to a single terminal bronchiole from the
pulmonary lobule
alveoli are covered by
capillaries and surrounded by elastic fibers
gas exchange occurs acroos
respiratory membrane
type 1 alveolar cells are
simple squamous epithelial cells
alveolar macrophages are
free ranging and phagocytize anything that reaches alveolar surface
type II alveolar cells produce
surfactant
lungs reside in the
pleural cavities
plueral cavities are lined by
parietal pluera
visceral pluera is what lines the
lungs
o2 poor blood is delievered bia
pulmonary arteries
o2 rich blood is carried away via
pulmonary veins
cardiac notch helps
fit the lungs so it has 2 lobes instead of three
hilum is where things enter
lungs and exit
bronchial arteries arise from the
aorta
bronchial arteries provide
blood to lung tissue
pulmonary ventilation involes through
inhalation/inspiration
exhalation/expiration
inhalation increases in
volume of thoracic cavity
volume of lungs
inhalation decreases
pressure inside lungs
exhalation decreases
volume of thoracic cavity
volume of lungs
exhalation increases
pressure inside lungs
main muscle for inhalation is
diaphragm
diaphragm is a sheet
of muscle and it is the floor of the thoracic cavity
external intercostals help
push ribs apart during inhalation
exhalation through
inhalation muscles relaxing
forced exhalation uses
internal intercostals
rectus abdominis
external oblique
internal oblique