respiratory system

Question 1

what is the pathway of air

Answer 1

When we breathe in air moves through the mouth and nose and then
travels into the trachea.

The trachea carries air from the throat to the lungs.

Near the lungs the trachea divides into two tubes called bronchi one
entering each lung.

The small bronchi further divide into bronchioles which are very narrow
tubes.

At the end of the bronchioles are openings to the alveoli. This is where
gaseous exchange takes place.

Question 2

what happens when you inhale

Answer 2

Air taken into the lungs

Diaphragm contracts or flattens enlarging the chest
cavity

Intercostal muscles contract causing the ribs to rise

Chest expands making the chest cavity bigger to take in
more air

Question 3

what happens when you exhale

Answer 3

Air released from the body

Diaphragm relaxes or domes reducing the size of the
chest cavity

Intercostal muscles relax causing the ribs to drop

Chest decreases making the chest cavity smaller to
force out air

Question 4

what is tidal volume

Answer 4

Tidal Volume – amount of air that enters the lungs during normal
inhalation at REST

Question 5

what is Inspiratory Reserve Volume

Answer 5

amount of extra air inhaled during a deep
breath

Question 6

what is Expiratory Reserve Volume

Answer 6

amount of extra air exhaled during a
forceful breath out

Question 7

what is Residual Volume

Answer 7

amount of air left in the lungs following maximal
exhalation.

Question 8

what is a spirometer

Answer 8

device
that measures lung
volume

Question 9

what is stroke volume

Answer 9

the volume of
blood that is pumped out of
the heart in one contraction