Lesson 7: Lung Capacity Flashcards
the volume of air in the lungs changes depending on many factors. what are these factors?
- physical activity (exercising or not)
- depth of breath (deep breath or short breath)
- sex (males typically tend to be able to hold more air in lungs than women)
- body type (all different body types: bigger, smaller, broader, etc)
- lifestyle (smoking, tobacco use)
what is total lung capacity?
the MAXIMUM volume of air that can be taken/held into the lungs during a SINGLE breath
it can also be:
- Inspiratory reserve volume + tidal volume + expiratory reserve volume + residual volume (added up gives you TLC)
- OR Vital capacity + residual volume
what capacity of our lungs are we using when we are doing normal involuntary breathing?
a small fraction of our TOTAL lung capacity is being used
what is tidal volume?
the volume (inhaled or exhaled) during normal involuntary breathing
what is the inspiratory reserve volume
the amount of additional air that can be inhaled after a normal inhalation
what is expiratory reserve volume?
amount of additional air that can be exhaled after a normal exhalation
what is residual volume?
even after a normal exhalation and extra exhalation is done, there is still an amount of air that stays in the lungs to prevent the lungs from collapsing- this is called the residual volume
AKA the amount of air that remains in your lungs after maximum inspiration
what is vital capacity?
the maximum amount of air that can physically be inhaled or exhaled (can be expired after a maximum inspiration)
what is the difference between vital capacity and total lung capacity?
EDIT slide 9
what is VO2?
the rate at which oxygen is used in the body
what is VO2 MAX?
the MAXIMUM rate at which your body can used oxygen during sustained intense physical activity
