Many flatworm species are parasitic.Which of the following is an adaptation of flatworms that is associated with a parasitic lifestyle?

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Quizplus · Accepted Answer

Flatworms that are parasitic have highly specialized cells called protonephridia that are used for excretion and osmoregulation, but also for nutrient absorption. They do not have a highly developed digestive system or a highly branched gastrovascular cavity, as they absorb nutrients through their body surface. They also do not have an organ system for oxygen transport, as their flat shape allows for efficient diffusion of gases across their body surface. They do not have multiple pairs of appendages, as they are generally small and do not require extensive locomotion abilities.

Many Flatworm Species Are Parasitic