The respiratory system
Thecontains the organs that allow us to get the oxygen we need and to remove the waste carbon dioxide we don't need. It contains these parts:
- tubes leading from the lungs to the mouth and nose
- various structures in the chest that allow air to move in and out of the lungs.
Movements of the ribs, rib muscles and diaphragm allow air into and out of the lungs. Take care - this is called breathing or ventilation, not respiration. When we breathe in, we inhale. When we breathe out, we exhale.
|Parts of the respiratory system|
Each bronchus divides further in the lungs into smaller tubes called bronchioles. At the end of each bronchiole, there is a group of tiny air sacs. These air sacs have bulges called alveoli to increase their.