Alveoli Carry Out Gas Exchange in the Body Flashcards
1
Q
What do the lungs contain?
A
Millions of little air sacs called alveoli where gas exchange happens
2
Q
What does the blood passing next to the alveoli contain and why?
A
It contains lots of CO2 and very little O2 as it has just returned to the lungs from the rest of the body
3
Q
Where does oxygen diffuse out of and where to?
A
Out of the alveolus and into the blood
4
Q
Where does carbon dioxide diffuse out of and where to?
A
The blood into the alveolus to be breathed out
5
Q
What happens when the blood reaches body cells?
A
Oxygen is released form the red blood cells and diffuses into the body cells
6
Q
Where does CO2 diffuse out of and where to? Where is it carried back to after?
A
Diffuses out of body cells into the blood. Carried back to lungs
