Flashcards in Breathing and Gas exchange Deck (8)
Name 10 things in and around the lungs
Larynx, Ring of cartilage, alveoli, pleural membranes, ribs, internal intercostal muscle, external intercostal muscle, bronchioles, trachea
Describe the flow of air
When we breathe in it goes down the trachea, into the two bronchi. Each bronchus divides into smaller tubes called Bronchioles eventually ending up in the alveoli.
What does the cartilage do?
Support the airways
What do the pleural membranes do?
Make an airtight shell around the lungs. In between there is the pleural cavity containing pleural fluid acting as a lubricant.
How is the airways kept clean?
The airways are lined with cells that can secrete mucus trapping and catching dirt/bacteria or covered with Cilia. They beat backwards and forewords sending the mucus to the mouth.
Diaphragm when we breathe in/out?
In-Diaghagm contracts, Ext Inter Musc contract ribs up/out Out-Diaphragm relax/dome shaped Intern Inter Musc contract ribs down/in
Red blood cells in, oxygen diffuses through one cell thick wall to re oxygenate the blood. Carbon dioxide diffuses the other way. Gain O2 loss CO2