You need to get oxygen into your bloodstream to supply your cells for respiration. You also need to get rid of carbon dioxide from your blood. This all happens in your lungs when you breath air in and out
The lungs are in the thorax
The thorax is in the top part of your body
Its separated from the lower part of the body by the diaphragm
The lungs are like big pink sponges and are protected by the rib cage. They’re surrounded by the pleural membranes
The air that you breath in goes through the trachea. This splits into two tubes called bronchi (each one is called a bronchus), one going to each lung
The bronchi split into progressively smaller tubes called bronchioles
The bronchioles finally end at small bags called alveoli where the gas exchange takes place