alveoli
alveoli: "air sacs"
epiglottis
epiglottis: "a special leaflike piece of cartilage"
larynx
larynx: "or voice box"
pharynx
pharynx: "or throat"
trachea
trachea (windpipe): "a tube extending from the larynx to the center of the chest"
bronchi
bronchi: [Tubes that] "carr[y] air from the trachea to the lung"
expiration (exhalation)
expiration (exhalation): [the process that occurs when] "Air is forced out of the lungs and air passages."
lungs
lungs: "organs [where] the divisions of the bronchi and the alveoli are found"
pleura
pleura: "a membrane, or sac" [that encloses each lung]
ventilation.
ventilation: "the process of breathing"
bronicholes
bronchioles: "the smallest branches" [of the bronchi]
external respiration
external respiration: "the exchange of oxygen and carbon dioxide between the lungs and bloodstream"
nasal cavities
nasal cavities: "two hollow spaces" [in the nose]
respiration
respiration: "process of inspiration and expiration"
cellular respiration
cellular respiration: "process [where] cells... use... oxygen and nutrients to produce energy, water, and carbon dioxide"
inspiration
inspiration (inhalation): "the process of breathing in air"
nasal septum
nasal septum: "A wall of cartilage... [that] divides the nose into two hollow spaces"
respiratory system
respiratory system: "consists of the lungs and air passages"
cillia
cilia: "Tiny, hairlike structures"
internal respiration
internal respiration: "the exchange of carbon dioxide and oxygen between the tissue cells and the bloodstream"
nose
nose: "consists of a bony framework and cartilage with skin covering this framework"
sinuses
sinuses: "cavities in the skull that surround the nasal area"