Breathing
Air moves in or out then there is a ................................................. difference.
There are two sets of muscles involved in breathing: 1. Intercostal muscles between the ............................. which contact to move the
...................... up and down.
2. Diaphragm muscles which contract to move the diaphragm .......................
How we breathe
Sequence
What happens
1.
Intercostal muscles
(contract/relax)
2.
Ribs move
(up/down)
3.
Diaphragm muscles
(contract/relax)
4.
Diaphragm
(raised/lowers)
5.
Volume of the chest
(increases/decreases)
6.
Pressure in the chest
(increases/decreases)
7.
Air pressure in the lungs is
(greater/lower) than the
atmospheric pressure.
8.
Air rushes (in/out) of the lungs.
Breathing in
(inhalation)
Breathing out
(exhalation)
Breathing
Air moves in or out then there is a ................................................. difference.
There are two sets of muscles involved in breathing: 3. Intercostal muscles between the ............................. which contact to move the
...................... up and down.
4. Diaphragm muscles which contract to move the diaphragm .......................
How we breathe
Sequence
What happens
9.
Intercostal muscles
(contract/relax)
10.
Ribs move
(up/down)
11.
Diaphragm muscles
(contract/relax)
12.
Diaphragm
(raised/lowers)
13.
Volume of the chest
(increases/decreases)
14.
Pressure in the chest
(increases/decreases)
15.
Air pressure in the lungs is
(greater/lower) than the
atmospheric pressure.
16.
Air rushes (in/out) of the lungs.
Breathing in
(inhalation)
Breathing out
(exhalation)