Our Bodies - The Respiratory System

Our Bodies - The Respiratory system

The Respiratory system takes in oxygen from the air we breathe and removes the carbon dioxide from our bodies.

• The air enters through the lungs when the rib muscles and diaphragm move.
• Oxygen is absorbed into the blood system. 
• The lungs are big air sacs. They absorb gasses from the air.
• Inhaling is breathing in. Exhaling is breathing out.
• The diaphragm is a muscle that controls breathing. The diaphragm moves down to make the ribs move out. The space in the lungs gets bigger and air rushes in to fill the bigger space. When the diaphragm moves up the ribs move back and the space is smaller, so the air rushes out. While the air is in the lungs, some of the oxygen gets into the blood stream and carbon dioxide leaves the blood and goes into the air.

Your respiratory system helps your body take oxygen from the air. The respiratory system is made up of your nose, mouth, trachea, lungs, and diaphragm.
SEE : Our Bodies - Human Organ Systems