Our Respiratory System carries oxygen from the air we breathe to our blood.
Which part of the respiratory system is a tube?
Which part of the respiratory system cleans and heats the air?
Which part of the air do we need?
Where do we breathe in?
How many lungs do we have?
Where does the oxygen pass into the blood?
More:
What muscle moves the lungs? diaphragm The diaphragm is a muscle under the lungs.
The left lung is smaller because it is the heart.
breathe in - breathe out