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Name: _____________________________
The Path of Air in the Respiratory System
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Mouth/Nose
• ________ help to keep the air _______.• ________ help keep the air _________. • ___________ help keep the air ______.
________ also sweeps _________ into the throat so you can swallow allowing the __________________ to destroy the bacteria and dust.
Cilia cleanMucus moistCapillaries warm
Cilia Mucus
Stomach acid
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Pharynx
• The _________ is the only part of the ______________ system that is shared with other system -- the ___________________ system.
• It is also called the ______________.
pharynxrespiratory
digestive
throat
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Larynx
• The _________ is located in the top part of the ____________.
• It is also called the ____________________.• Two ____________________, which are folds of
______________ tissue that produce your _______, stretch across the opening the larynx.
• The _______________ of the vocal cords makes the air molecules _____________ creating a sound, your __________.
• ________ vocal cords produce a _______ voice.• ________ vocal cords produce a _______ voice.
larynxtrachea
voiceboxvocal cords
connective voice
movementvibrate
voiceLong deepShort high
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Trachea
• The ____________ is also called the windpipe.• ____________ helps strengthen and keep it open.• It is also lined with __________ and __________.• When your trachea is irritated, you __________.• ________ should only enter the trachea. • If food enters the trachea, it can ________ air from
entering the lungs and you will _____________.• The ________________ is a flap of tissue that seals
the trachea when you ________________.
tracheaCartilage
cilia mucuscough
Airblock
chokeepiglottis
swallow
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Bronchi and Bronchioles
• _________ direct _______ into the lungs.• _______________ is when the bronchial
tubes become irritated, swell up, and are clogged with _________, which makes you _______.
• __________ damages the ___________ in your respiratory system. This can permanently damage your lungs because ____________ can build up, causing infections.
Bronchi air
Bronchitis
mucuscough
Smoking cilia
bacteria
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Alveoli
• __________ move __________ from the ______ into the _________________.
• They also remove ______________ from the blood.
• The walls of the alveoli and capillaries are ____________, which means substances can easily pass through them easily.
• The huge ____________________ of the alveoli allows the lungs to ___________ a large amount of _____________.
Alveoli
oxygen
air bloodstreamCarbon dioxide
permeable
surface areaabsorb
oxygen