Respiratory System 2
Where air enters the body.
the nose or mouth
Bones that protect the lungs and heart.
the ribs
What muscle helps us breathe by moving up and down?
Diaphragm
Where does gas exchange occur in the lungs
Alveoli
What are the tiny air sacs in the lungs called
Alveoli
another name of windpipe
trachea
Name the two functions of the respiratory system.
to supply oxygen to the blood and remove also expel waste gases (CO2)
During_______ the ribcage moves downward and inward and the diaphragm domes upward
exhalation/expiration
The important gas that we inhale when breathing
oxygen
gas exchange
During ________ the volume of the lungs increases and the pressure decreases.
inhalation/inspiration
Why are alveoli important?
They are the site of gas exchange
The resting have on breathing rate?
DECREASE
internal--gas exc w body, external-gas exchange with environment
The trachea branches into two ....
Bronchi