respiratory system Flashcards
1
Q
what are 3 adaptations of alveoli
A
- lots of them-high surface area
- surrounded by capillaries-good blood supply
- walls are on cell thick allowing gas to pass through easily
2
Q
what 5 things happen when we breathe in
A
- ribs move out and upwards
- lungs draw in air
- diaphragm contracts and flattens
- pressure in lungs decreases
- volume of lungs increase
3
Q
what 5 things happen when we breathe out
A
- ribs move in and downwards
- diaphragm relaxes and domes
- pressure in lungs increases
- volume of lungs decrease
- lungs push out CO2
4
Q
what is tidal volume and what’s the formula
A
the amount of breath inhaled or exhaled in each normal breath during rest or exercise
tidal volume= minute ventilation/number of breaths per minute
5
Q
whats minute ventilation
A
volume of air you breathe per min
6
Q
whats vital capacity
A
maximum amount of air you can breath out
7
Q
residual volume
A
volume of air left in your lungs after breathing out
