The developmental cycle of a tapeworm.

All tapeworms are internal parasites of humans and vertebrates. To preserve their species, they have complex development cycles. For example, a bullish tapeworm.

The cow can eat tapeworm eggs along with the grass. In its intestines, a larva with 6 hooks emerges from the eggs. It bores the walls of the intestine and goes out into the blood, which delivers the larva to the muscles, where it turns into a Finn.

If a person eats infected, poorly cooked meat, then an adult worm develops from the Finns in his intestines.

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