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16 terms

Respiratory System

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breathing
the mechanical movement of air into and out of the lungs
external respiration
exchange of gases between the atmosphere and blood
internal respiration
exchange of gases between the blood and the cells of the body
trachea
a long tube lined with rings of cartilage, also called the windpipe,
bronchi
either of the two main branches of the trachea, two short branches located at the lower end of the trachea that carry air into the lungs.
bronchioles
small branches of the bronchi that are dead ends with tiny air sacks called alveoli at the end
lungs
main organs of the respiratory system, where gas exchange takes place
alveolus
air sac at the end of bronchiole where O2 and CO2 are exchanged from capillaries
asthma
A serious condition where the bronchioles in the lungs become narrowed and make breathing difficult
bronchitis
Inflammation of the bronchial tubes, which causes coughing and mucus production
pnuemonia
infection of lung when alveoli becomes filled with fluid
emphysema
disease in which the tissues of the lungs lose elasticity, making breathing very difficult
lung cancer
a lung disease in which cells in the lungs grow out of control
tidal volume
amount of air you move into or out of your lungs during a single respiratory cycle.
inspiration reserve volume
forced inspiration after a relaxed inspiration (3100 ml)
expiration reserve volume
forced exhalation at the end of a tidal cycle