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Tapeworms lack a mouth and a well-developed digestive system because they are parasitic organisms that absorb nutrients directly from their host's intestines through their skin. Their flat, segmented bodies are adapted for a life of absorption rather than digestion, allowing them to maximize nutrient uptake. Additionally, their sensory structures are minimal since they reside in a stable environment within the host, reducing the need for advanced sensory capabilities to navigate their surroundings.

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1mo ago

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