UNICELLULAR PARASITES AND THEIR TYPES
Abstract
The body of animals belonging to the unicellular subkingdom consists of a single cell or a group of similar cells. Although unicellular organisms are similar to multicellular organisms in many ways, they differ sharply from them physiologically. Because unicellular organisms are independent living organisms, they have the ability to exchange substances, move, react, reproduce, and all other properties characteristic of living organisms. Such functions are performed by special organoids (organelles) in the cell. The organoids of unicellular organisms differ from the organs of multicellular organisms in that they are part of the cell. Unicellular organisms move with the help of pseudopods, special cilia, and cilia; they breathe through the surface of the body. Their need for oxygen is not the same. Animals that live in the depths of the water and in the mud require less oxygen.
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