The respiratory system enables oxygen to be taken into the body and it ensures the movement of carbon dioxide outside the body.
When we breathe in, our diaphragm moves downwards. Air enters the lungs through the larynx where it is filtered. from there it travels down the trachea, to the bronchi and then to the bronchioles. Alveoli are the air sacs where the exchange of gases takes place between the lungs and the blood. The alveoli pass oxygen into the blood and the blood passes carbon dioxide to the lungs. As we exhale, the diaphragm rises upwards causing the air to flow from the trachea to the larynx and exhalation from the mouth.
