ACTIVITY: 3024D
COMPARE INTESTINAL LINING
Take 3 pieces of paper, tape them together/lengthwise and fold them accordion style, so
that when laid on the table they are the same length as one normal sheet. Compare with a
normal sheet of paper the students both, then stretch out the larger one. Ask why it is
good to have a folded lining in the intestine, which can only be so long in an animal's
body (In this example, you increased the surface area by a factor of 3.).