to get oxygen into the blood,to be carried around the body for use in respiration, and to remove waste co2 from the blood.
1 of 7
diagram of the respiratory system
x
2 of 7
diagram of the alveoli
x
3 of 7
how are alveoli(air sac's) adapted for gas exchange?
provides a large surface area for gas exchange,thin walls of A mean gases can pass through. Moist lining allows oxygen to dissolve.Have food blood supply,so more gases can be exchanged.
4 of 7
name the differences between inspired and expired air
IA-breathed in,body absorbs oxygen from this EA-breathed out,adds co2 and water vapour before breathing it out,less oxygen,more co2,more water vapour.
5 of 7
describe the breathing mechanism
diaphragm moves down+rid cage moves up and out-cases increase in volume of thorax.Increased vol-means pressure lower-allows lungs to expand.air is drawn in.Diaphragm moves upwards+rib cage moves in and down.-decreases vol+increases pressure of tho
6 of 7
finished:)x
x
7 of 7
Other cards in this set
Card 2
Front
diagram of the respiratory system
Back
x
Card 3
Front
diagram of the alveoli
Back
Card 4
Front
how are alveoli(air sac's) adapted for gas exchange?
Back
Card 5
Front
name the differences between inspired and expired air
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