Breathing / Gas Exchange Flashcards
What happens when we breathe?
When you breathe, you take an oxygen and give out carbon dioxide. This is called gas exchange, it takes place inside of your lungs.
What are your lungs made from?
What are they protected by?
Your lungs are made of an elastic tissue that expands when you breathe in. They are protected by your ribs.
What is the process for breathing?
Air enters your body through your mouth and nose➡️ it moves down the trachea ➡️ air moves down the bronchus ➡️ Air goes down the bronchiole ➡️ and moves down into a alveolus and oxygen is diffused into the blood.
How do you breathe?
-The muscles between your ribs contract (this pulls your rib cage up and out)
-The diaphragm contracts (it moves down)
-The volume inside your chest increases
-The pressure inside your chest decreases ( this draws air to your lungs)
What happens to your body when you exhale?
-The muscles between your ribs relax (this pulls your rib cage down and in)
-The diaphragm relaxes (it moves up)
-The volume inside your chest decreases
-The pressure inside your chest increase (this pushes air out of your lungs)
How can we measure lung volume?
You can test your lung volume by using a plastic water bottle. As you breathe into the plastic tube air from your lungs takes the place of the water in the bottle. If you breathe out fully the volume of water pushed out of the bottle is equal to how much air your lungs can hold.
Why do we breathe in and out?
Breathing is the movement of air in and out of the lungs. When we breathe in, we inhale to take in oxygen. When we breathe out with exhale to remove carbon dioxide. This is because the oxygen you’ve breathed in is used for respiration to transfer energy around your body.
