[Campbell Biology P.958] Tapeworms sometimes infect the human alimentary canal, anchoring th... | Practice Question

Tapeworms sometimes infect the human alimentary canal, anchoring themselves to the wall of the small intestine. Based on how digestion is compartmentalized along the mammalian alimentary canal, what digestive functions would you expect these parasites to primarily benefit from?

  • A: Initial mechanical breakdown of food in the mouth.
  • B: Protein denaturation and initial digestion in the stomach.
  • C: Absorption of already digested nutrients from the small intestine.
  • D: Water absorption and feces formation in the large intestine.

Explanation

The small intestine is the primary site for the completion of digestion and the absorption of nutrients. Tapeworms, by anchoring themselves to the wall of the small intestine, are strategically positioned to absorb already digested nutrients directly from the host's alimentary canal, minimizing their need for complex digestive systems of their own. This reflects the compartmentalization of digestion where different stages occur in specific organs.