Feature pool — click a statement, then click the matching surface
Task: Match each feature statement to the correct exchange surface. Select a statement, then select a surface card above. Press Check Answers when ready.
Tip: Think about what is being exchanged and where each structure is located. Keys: 1=Leaf, 2=Alveolus, 3=Villus, 4=Root Hair, 5=Capillary. Press R to reset.