To help students learn about the small intestine, a teacher brings in a very fuzzy towel. Students are told the fuzz represents the villi that line the small intestine. They
compare the fuzzy towel to other towels to see which is best at absorbing water.
Which of the following would be hardest to show using this model?
A The small intestine contains a large number of villi.
B The villi are much smaller than the small intestine.
C The villi move to stir up materials in the small intestine.
D The villi have smaller villi located on them.