Our site uses cookies. Some of the cookies we use are essential for parts of the site to operate and have already been set. You may delete and block all cookies from this site, but parts of the site will not work. To find out more about cookies on this website, see our Cookie Policy

Your browser does not appear to have javascript enabled. This page needs JavaScript activated to work properly. Please enable javascript or choose a different browser (Chrome or Safari)

This test is run by .
Note that your final mark will not be saved in the system.

9. Gas exchange systems Pindrop

Running Total

Attempt

1 of 3

Click on a top label, then click on its correct position on the diagram. Or, drag a top label and drop it onto the correct position. Position all the labels before clicking ‘Check’.

The diagram shows an alveolus (air sac) in the lung. Drag the labels to the correct places to show what happens during gas exchange.

oxygen

blood entering the lung – low O₂, high CO₂

air in and out

carbon dioxide

blood leaving the lung – high O₂, low CO₂

red blood cell

blood capillary

alveolus wall

This is your 1^st attempt! You get 3 marks for each one you get right. Good luck!

Pass Mark

70%