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What is the main function of the respiratory system?
Breathe in oxygen and remove carbon dioxide
Which organ is responsible for taking in air from the environment?
Nose
What muscle helps the lungs expand and contract when we breathe?
Diaphragm
What are the two main organs of the respiratory system?
Lungs and thrachea
What happens when we exhale?
We release carbon dioxide
Which part of the respiratory system connects the throat to the lungs?
Trachea
The tiny air sacs in the lungs where gas exchange happens are called:
alveoli
Which gas do we need to survive?
Oxygen
What happens to the diaphragm when we inhale?
It moves down
The respiratory system helps us speak by moving air through the vocal cords.
True
False
We breathe out oxygen and breathe in carbon dioxide.
True
False
Air travels from the nose to the lungs through the trachea.
False
True
The left lung is larger than the right lung.
True
False
Why is oxygen important for our cells?
Oxygen helps cells produce energy.
