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13 Terms
the lungs are surrounded by what
pleural membrane
membrane that forms an airtight seal around lungs
what does the ribcage do
protects the organs of the respiratory system
goblet cells
secrete mucus that trap of microorganisms
cilia
move mucus up towards the throat from the lungs
smooth muscle
they contract and relax to narrow/expand airways
elastic fibres
stretch when we breathe in and recoil when we breathe out
cartilage
prevent trachea and bronchi from collapsing during inhalation
tidal volume
volume of air in each breath
vital capacity
maximum volume of air that a person can expel from the lungs after max inhalation
breathing rate
the number of breaths taken per minute
oxygen consumption
the volume of oxygen used by the body
why do the lines on a spirometer decrease
volume of gas in the chamber decreases as carbon dioxide is absorbed