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diaphragm contracts, rib cage rises and increases the volume of the chest cavity, air rushes into the lungs


diaphragm relaxes & moves up into original dome shape. This decreases the chest volume & moves air out of the lungs


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.


tiny air sacs within the lungs where gas exchange occurs between air & blood. 1 cell thick and located at the end of the bronchioles.


two spongy organs that are large & sac-like in the thoracic cavity enclosed by the diaphragm and rib cage. where external respiration happens


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.


small tubes that branch off the bronchi that contain clusters of alveoli at each end.


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


The main air tube leading into the respiratory system. The trachea is made of alternating rings of cartilage and connective tissue.


a flap of cartilage that prevents food from entering the trachea when eating and opens to allow breathing and speaking


Has ring of cartilage to keep pathway open, branches off trachea in a Y shape to take air into lungs


caused by viruses that mutate regularly- can be very serious for infants, elderly & those with other health complications


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


chronic allergic disorder characterized by episodes of severe breathing difficulty, coughing, and wheezing using the air passage to narrow & causes shortness of breath


drug delivered directly to the lungs by an inhaler, stimulate air passages to increase in diameter


voice box; passageway for air moving from pharynx to trachea; contains vocal cords

Heimlich Manuever

giving abdominal thrusts when choking, cant speak or breathe


disease of lungs that results in fluid build up in alveoli


obstructive pulmonary disease, overexpansion of the alveoli with air and destructive changes in their walls resulting in loss of lung elasticity and gas exchange


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


specialized protein that carries oxygen on red blood cells


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


air-filled spaces in the skull that open into the nasal cavity


a slimy substance produced in the nose and throat to moisten and protect them

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