respiratory system - madison county · pdf fileparts of respiratory system •nasal cavity...
TRANSCRIPT
Parts of respiratory
system
• Nasal cavity
• Oral cavity
• Trachea
• Bronchi
• Lung
• Alveoli
• Diaphragm
Functions of upper respiratory tract:
nasal/oral cavities and trachea • Nose/Mouth:
• Filters air, Warms air, Moistens air. Also Provides resonance in speech (so you don’t sound funny)
• Larynx: “voice box” Holds our vocal chords.
• Trachea:
• Commonly called your “wind pipe.” Air travels down it to
your lungs
Functions of the lower respiratory tract:
bronchi, lung, alveoli, diaphragm
• Bronchi: Branches that “stem” off of the trachea and lead to lungs. Divides into smaller tubes called bronchioles. These tubes carry oxygen through your lungs.
Functions of Lungs
• Lung: Holds bronchi, bronchioles, and alveoli.
• Fact: Lungs are the only organ in the body that
can float on water.
Function of Alveoli
• Alveoli: Lungs contain approx. 600 million
alveoli. Where exchange of oxygen (from
air) and carbon dioxide (from body)
occurs.
Function of diaphragm
• Diaphragm: Responsible for breathing.
When the diaphragm contracts, the
ribcage expands and the contents of the
abdomen are moved downward. When the
diaphragm relaxes, the air is forced out of
the body.
Epiglottis Is the part of your body that flops
down over the windpipe when you
swallow to keep food from going into
your lungs. Without your epiglottis,
you would cough or choke every
time you eat.
What’s a hiccup?
• Ever wonder what a hiccup is? It’s an involuntary spasm of the diaphragm that forces air out of the lungs. The blast of air speeds through the vocal chords closing the epiglottis making the familiar hiccup sound.
• How do you cure hiccups? There are over 50 methods believed to get rid of hiccups. What have you heard?
Why do we yawn?
• When your breathing becomes slower than normal, there is less oxygen delivered to your body. A yawn is the bodies way of taking a large amount of oxygen in at once to compensate for slower breathing. Typically, we yawn when we’re tired because our breathing slows down. People often also make a connection with yawning and boredom (but not in health class).
Nasal Cavity
Oral Cavity
Larynx
Trachea
Lung
Bronchi
Diaphragm Alveoli
Bronchioles
(Voice Box)
Epiglottis
Asthma Research
• Go to www.kidshealth.org
• Click on teens
• Type asthma into the search box on the
left.
• Choose the article called asthma. It
should be the 5th one down.
• Answer the questions using the article.