Khan Academy Static

3B: If you place your hand on your ribs and take a deep breath, you’ll notice that your chest expands and your back straightens. As this occurs, air is rushing through your windpipe and branches off to either your left or right lung. After about 20-30 more branch points, oxygen in the air ends up in the alveoli where it diffuses into the surrounding liquid, slipping into the blood. This rapid microscopic gas exchange allows oxygen to be taken up during inhalation as carbon dioxide leaves during exhalation.

15027_The_respiratory_center.html

15020_Meet_the_lungs.html

15024_Henry_s_law.html

15028_Thermoregulation_in_the_lungs.html

15025_Fick_s_law_of_diffusion.html

15026_Oxygen_movement_from_alveoli_to_capillaries.html

15021_Inhaling_and_exhaling.html

15023_O2_and_CO2_solubility.html

15022_How_does_lung_volume_change_.html