These are tiny sacs of the lung tissue where exchange of gases takes place.
ALVEOLI
It moistens the air and keeps the lining from drying out.
MUCUS
In an average day, you may breathe more than HOW MANY TIMES?
20,000
As you do this, your diaphragm tightens and moves downward.
BREATHING IN
When you inhale, the air enters the body. This process is called...
INHALATION
Other term for "WINDPIPE"
TRACHEA
These are the passages that direct air to the lungs.
BRONCHI
Cells lining in the nasal cavities have tiny hair like projections called...
CILIA
Air enters the body through the nose and then moves into spaces called...
NASAL CAVITY
the act or process of breathing is called...
RESPIRATION
The exchanges of Gases happen in?
ALVEOLI
As you do this, your diaphragm relaxes and springs back into its natural, curved shape pushing against your lungs
BREATHING OUT
It is a strong, flat sheet of muscles that help you breathe.
DIAPHRAGM
These are the main organs of the respiratory system.
LUNGS
When you inhale, the air enters the body. This process is called...
EXHALATION