After penetrating the skin, schistosome worms first enter which body system?

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Study for the Introduction to Parasitology Test. Use flashcards and multiple-choice questions, each question offers hints and explanations. Prepare for your exam thoroughly!

Multiple Choice

After penetrating the skin, schistosome worms first enter which body system?

Explanation:
When schistosome larvae invade the skin, they immediately access the host’s circulatory system. They move from the skin into dermal capillaries and small veins, hitching a ride in the bloodstream to reach their sites of maturation. This bloodstream route is essential for distribution to organs like the lungs and then onward to the venous systems where adult worms settle. They don’t jump directly into the digestive tract, lymphatic system, or nervous system at this stage; those pathways become involved later in their migration and localization.

When schistosome larvae invade the skin, they immediately access the host’s circulatory system. They move from the skin into dermal capillaries and small veins, hitching a ride in the bloodstream to reach their sites of maturation. This bloodstream route is essential for distribution to organs like the lungs and then onward to the venous systems where adult worms settle. They don’t jump directly into the digestive tract, lymphatic system, or nervous system at this stage; those pathways become involved later in their migration and localization.

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