Structure and function of body systems

Question 1

When you breath in (inhale)

Answer 1

. muscles between ribs contract
. ribs are pulled up and out
. diaphragm contracts and flattens
. volume of the chest increases
. pressure inside the chest decreases
. air rushes into the lungs

Question 2

When you breath out (exhale)

Answer 2

. muscles between ribs relax
. ribs are pulled in and down
. diaphragm relaxes and moves up
. volume inside chest decreases
. pressure inside the chest increases
. air is forced out of the lungs