What changes in the body structure and vital processes leads to a parasitic lifestyle?

The way of life leads to profound changes in the structure and vital activity of parasites and serves as the reason for the appearance of many adaptations to living conditions. In parasites, attachment organs develop – suckers, hooks, claws, etc. In blood-sucking animals, the capacity of the digestive system increases due to the appearance of blind outgrowths of the intestinal tube (ticks, leeches). Many parasites lose their individual organs and entire systems – the organs of vision, movement, they simplify the structure of the senses. In tapeworms, which absorb nutrients in the intestines of the host surface of the body, the digestive system is absent. Parasite plants lose various vegetative organs – roots, leaves.

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