Processes in the human body are often complex and can be difficult to represent with a physical model. Evaluate the model that Sammi designed by thinking about how her model compares to the actual interaction of the digestive and circulatory systems. Then, sort the statements according to whether they are strengths or weaknesses of her model. Not all statements will be used.

The major organs responsible for
circulating blood are included.
All of the major organs involved
in digestion are included.
The process of nutrient absorption is
depicted in a visual way.
Cardboard and the tissue of the
digestive tract have different
properties.

The corrugated cardboard shows
how villi increase the surface
area of the digestive tract.
The capillaries are more complex
than one, large plastic tube.
Only one system is included
in the model.