Answer: So I think these are the answers.
Strengths: Corrugated cardboard shows how villi increase the surfa area of the digestive system.
The major organs responsible for circulating blood are included.
The process of nutrient absorption is depicted in a visual way.
Weaknesses: Only one system is included in the model.
Explanation:
Major organs in digestive sytem are mouth, esophagus, stomach, small intestine, large intestine, rectum and anus. None of these are included.
The lining of your intestine is folded like the corrugations of cardboard, and this folding gets more surface area into a small space. The folds are covered by fingerlike projections called villi.
