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28 terms

Respiratory System

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inhaling
diaphragm contracts, rib cage rises and increases the volume of the chest cavity, air rushes into the lungs
expiration
diaphragm relaxes & moves up into original dome shape. This decreases the chest volume & moves air out of the lungs
diaphragm
a sheet of muscle that separates the organs of the chest cavity from those of the abdminal cavity. Moves up and down to aid in respiration.
alveoli
tiny air sacs within the lungs where gas exchange occurs between air & blood. 1 cell thick and located at the end of the bronchioles.
lungs
two spongy organs that are large & sac-like in the thoracic cavity enclosed by the diaphragm and rib cage. where external respiration happens
pharynx
throat; passageway for food to the esophagus and air to the larynx
nasal cavity
the cavity behind the nose and above the roof of the mouth that filters air and moves mucous and inhaled contaminants outward and away form the lungs.
bronchioles
small tubes that branch off the bronchi that contain clusters of alveoli at each end.
cilia
The fine hairlike projections from certain cells such as those in the respiratory tract that sweep in unison and help to sweep away fluids and particles
trachea
The main air tube leading into the respiratory system. The trachea is made of alternating rings of cartilage and connective tissue.
epiglottis
a flap of cartilage that prevents food from entering the trachea when eating and opens to allow breathing and speaking
bronchi
Has ring of cartilage to keep pathway open, branches off trachea in a Y shape to take air into lungs
colds
caused by viruses that mutate regularly- can be very serious for infants, elderly & those with other health complications
bronchitis
inflammation & excess mucus production in the bronchi & bronchioles, caused by viral or bacterial infection or by chemical irritants (ex. smoke) - causes narrowing of the air passageways, making breathing & gas exchange difficult, leads to coughing
asthma
chronic allergic disorder characterized by episodes of severe breathing difficulty, coughing, and wheezing using the air passage to narrow & causes shortness of breath
corticosteroids
drug delivered directly to the lungs by an inhaler, stimulate air passages to increase in diameter
larynx
voice box; passageway for air moving from pharynx to trachea; contains vocal cords
Heimlich Manuever
giving abdominal thrusts when choking, cant speak or breathe
pnuemonia
disease of lungs that results in fluid build up in alveoli
emphysema
obstructive pulmonary disease, overexpansion of the alveoli with air and destructive changes in their walls resulting in loss of lung elasticity and gas exchange
smoking
chronic bronchitis, emphysema, lung cancer, and heart disease can be caused by this
lung cancer
uncontrolled growth of cells in lung tissue Causes:smoking Treatment:chemo, surgery, radiation
respiratory system
system responsible for taking in oxygen and releasing carbon dioxide using the lungs
hemoglobin
specialized protein that carries oxygen on red blood cells
capillaries
tiny, thin-walled blood vessels that allow the exchange of gases and nutrients between the blood and the cells of the body
organs of the respiratory system
Lungs, bronchi, trachea, pharynx, larynx, epiglottis, nose
sinuses
air-filled spaces in the skull that open into the nasal cavity
mucus
a slimy substance produced in the nose and throat to moisten and protect them