Soc 17: Structure of the Respiratory System Flashcards
Why do we need the respiratory system
Get oxygen into the body
Remove CO2 from the body
Keep the body supplied with oxygen during physical activity
Percent of oxygen and CO2 when breathing in and out
In: 20% oxygen + 0.4% carbon dioxide
Out: 16% oxygen + 4% carbon dioxide
Vital capacity
The greatest amount of air that can be passed into and out of the lungs by the most forceful inspiration and expiration
Tidal volume
The amount of air inspired and expired with each breath
The diaphragm during inspiration and expiration
It changes from a dome shape to a flatter shape when breathing in, then relaxes and goes back to the dome shape when breathing out
What happens during inhaling
Air passes through the larynx and then through the trachea into one of the two branches called the bronchi, then air passes into either lung. Small branches called bronchioles extend out from the bronchi and at the end they form millions on tiny sacs called alveoli. In the alveoli oxygen passes into the blood
Oxygen debt
The amount of oxygen needed at the end of a physical activity to break down any lactic acid.
Anaerobic exercise
working at a high intensity level without oxygen for energy production.
VO2 max
the volume of oxygen an athlete can consume while exercising at maximum capacity.
Respiratiom
the movement of air from outside the body into the cells within tissues.
Trachea
the tube that takes air into the chest, also known as the windpipe.
Bronchi
tube along which air passes from the trachea into the lungs.
Bronchioles
smaller branches coming off the bronchi.
Alveoli
tiny sacs at the end of the bronchioles, where gas exchange takes place.
Gaseous exchange
the delivery of oxygen from the lungs to the bloodstream and the removal of carbon dioxide from the tissues.
