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Chapter 11
Respiratory System
26
Science
5th Grade
01/24/2013

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Term
bronchi
Definition
air passages that branch off the trachea
Term
pharynx
Definition
also called the throat
Term
bronchitis
Definition
an infection of the bronchi
Term
inhaling
Definition
breathing in
Term
involuntary
Definition
breathing that happens automatically
Term
voluntary
Definition
breathing that you can think about and control for a short while
Term
pitch
Definition
depends on the thickness and length of your vocal cords
Term
have mucus and cilia that keep the respiratory system clean
Definition
nose
trachea
bronchi
Term
the lungs
Definition
sac-like organs that replace the carbon dioxide in your blood with oxygen
Term
smoking
Definition
smoke contains poisonous chemicals
smoke keeps the alveoli from working properly
smoke particles cool and form a sticky tar that keeps the cilia from working properly
Term
lung capacity
Definition
the amount of air that can be taken itno the lungs with one breath
Term
epiglottis
Definition
the flap of tissue that covers the trachea when a person swallows
Term
esophagus
Definition
the food pipe
Term
chest muscles and diaphragm
Definition
the muscles that change the space and pressure insid the body to allow breathing
Term
exhaling
Definition
breathing out
Term
brain
Definition
the part of the body that controls breathing
Term
diaphragm
Definition
the part of the respiratory system that is a strong curved muscle attached to the lower ribs and backbone
Term
asthma
Definition
the respiratory problem that often causes the muscles around the bronchial tubes to tighten more than normal, making it hard for the person to breathe
Term
larynx
Definition
the voice box
Term
trachea
Definition
the windpipe
Term
alveoli
Definition
tiny air sacs in the lungs
Term
capillaries
Definition
tiny blood vessels that surround the alveoli
Term
cilia
Definition
tiny hairs that help filter air
Term
vocal cords
Definition
two small bands of elastic tissue that help you make sound
Term
oxygen
Definition
what every cell needs in order to live and function
Term
the alveoli
Definition
where the exchange of oxygen and carbon dioxid take place
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