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1. 
Your body couldn’t breathe without this system. Which one is it?
A.
Perspiration system
B.
Respiratory system
C.
Photosynthesis
D.
Urinary system
2. 
The respiratory system is made up of the trachea, the lungs, and the
A.
Diaphragm
B.
Liver
C.
Esophagus
D.
Pancreas
3. 
When you breathe in air, you bring oxygen into your lungs and blow out:
A.
Carbon dioxide
B.
Oxygen
C.
Hydrogen
D.
Carbon monoxide
4. 
When you inhale, your diafhragm
A.
moves down and our ribs move out.
B.
moves up and our ribs move back
5. 
What is the name of the tiny air sacs in your lungs?
A.
Bronchioles
B.
Alveoli
C.
Bronchi
D.
pharyinx
6. 
It's not good for your lungs and your health
A.
exercising
B.
smoking
C.
breathing
D.
singing
7. 
The trachea is also called the:
A.
Respiratory pipe
B.
Bronchus
C.
Windpipe
D.
nasal cavity
8. 
Separate the esophagus and the trachea
A.
Epiglottis
B.
Larhynx
C.
vocal cords
D.
tongue