RESPIRATORY SYSTEM Human physiology. Your cells need food (digestive system) and oxygen Respiration is the process that gets oxygen to the cells and.
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RESPIRATORY SYSTEM
Human physiology
Your cells need food (digestive system) and
oxygen
Respiration is the process that gets oxygen to the
cells and removes waste gases.
BREATHING FOR LIFE
THE RESPIRATORY SYSTEM
1st step: breathing air into your mouth and/or
nose• Nasal - nose cavity• Oral – mouth cavity• Diaphragm – sheet of muscle under lungs
2nd step: air passes structure called larynx• Larynx – voice box contains vocal cords• Vocal cords vibrate to produce sounds for speech
THE RESPIRATORY SYSTEM
3rd step: trachea• Trachea a long tube leading to your lungs• Trachea is also called your windpipe• Epiglottis – flap of skin that closes over trachea when you
swallow (so food doesn’t get into lungs!
4th step: bronchi &bronchioles• Bronchi are 2 small tubes which enter the lungs• Become smaller tubes within the lungs called bronchioles
5th step: lungs• Your lungs are like sponges• Many small air sacs that fill up when you breath in• Oxygen passes from air sacs into your blood
THE RESPIRATORY SYSTEM
Your blood carries the oxygen to all of your cells
Oxygen combines with food to make energy that
you need
Waste products (carbon dioxide and water vapor)
are produced
Waste products are carried back to you lungs and
you breath them out!
mouth
Bronchioles
Air sacs
EXIT SLIP
1. What path does air take after
entering the body?
2. How does oxygen pass from your
lungs into your blood?
3. What are the waste products that
we breathe out?
Through the walls of the air sacs
Air goes down the throat to the larynx, trachea, bronchi and then lungs
Carbon dioxide and water vapor
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