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Organs
In and Out
Vocabulary
Flow of Air
100
The main organ of the respiratory system.
What is the lung?
100
The gas that enters your body during breathing.
What is oxygen?
100
A collection of organs whose primary function is to take in oxygen and expel carbon dioxide.
What is the respiratory system?
100
Two ways air can enter the body.
What are the nose and the mouth?
200
The area of the throat that contains the vocal cords and produces vocal sounds.
What is the larynx?
200
The gas that exits your body during breathing.
What is carbon dioxide?
200
The exchange of oxygen and carbon dioxide between living cells and their environment.
What is respiration?
200
Inhaling air and exhaling carbon dioxide.
What is breathing?
300
The passage from the mouth to the larynx and esophagus.
What is the pharynx?
300
The muscle that controls breathing.
What is the diaphragm?
300
DAILY DOUBLE! Tiny air sacs of the lungs where oxygen and carbon dioxide are exchanged.
What are the alveoli?
300
The tiny blood vessels that line each alveolus.
What are the capillaries?
400
The tube connecting the larynx and the lungs.
What is the trachea?
400
The process in which the diaphragm contracts.
What is inhaling?
400
The flap of skin that prevents food from enter the trachea.
What is the epiglottis?
400
The smallest branches of the lungs.
What are the bronchioles?
500
DAILY DOUBLE! Two tubes connecting the lungs and trachea.
What are the bronchi?
500
The process in which the diaphragm relaxes.
What is exhaling?
500
Something harmful and addictive that will hurt your lungs.
What is smoking?
500
Where carbon dioxide is exchanged for oxygen.
What are the alveoli?