The Breathing Process
Terms in this set (8)
Breathing In: Step 1
Your diaphragm moves down as it contracts. Your ribs move outward. Theses movements make the space inside the chest larger.
Breathing In: Step 2
As you take a breath, air rushes in through the mouth and the nose, passing through the throat. The epiglottis opens in your throat, allowing the air to lead into the trachea, which is a tube that enters the chest cavity.
Breathing In: Step 3
While in the trachea, the air is filtered. The trachea then splits into two smaller tubes called bronchi, which lead into the lungs.
Breathing In; Inside the Lungs: Step 4
There, the bronchi divide into smaller and smaller branches called the bronchial tube.
Breathing In; Inside the Lungs: Step 5
Air finally moves into tiny air sacs called the Alveoli. It is here where oxygen enters the bloodstream.
Breathing In; Inside the Lungs: Step 6
As the other part of the exchange, CO2 moves from the blood through the walls of capillaries and alveoli in order to be expelled by the lungs.
Breathing Out: Step 6
Your diaphragm moves up as it relaxes. Your ribs move inward. These movements make the space inside the chest smaller.
Breathing Out: Step 7
This pushes air in the form of CO2 out of the lungs, traveling the reverse path that oxygen had taken.