The leech has 32 brains, quite similar to the human nervous system.

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The leech species has them close to earthworms, which have more than 650 species of leeches, varying in size, diet and habitat.Leeches live in marshes, rivers and lakes.

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The size of a leech belongs to each species, leeches range from 7.2mm-76.2mm, especially with leeches up to 40.64cm long.

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The leeches have 32 brains, which are quite similar to the human nervous system, so leeches are used in the study of brain instability.

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Leeches are blood-sucking species, some species eat rotten plants or different insects and insects.

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This is a voracious species, which can suck a large amount of blood 5 times their body weight.Immediately after eating, the leeches will separate from the victim.

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The leech species can reproduce by themselves without a mate, they produce a large number of eggs in the cocoon and keep the eggs in them.

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Each species of leeches has a different age, there are a few species that can live up to 10 years.