In the cells of which organisms are there special organelles? What functions do they perform?

These are organoids of movement. There are simple eukaryotic (ciliates, plasmodium), prokaryotic (bacteria – vibrios), as well as special cells of multicellular eukaryotes – sperm, ciliary epithelium.
Cilia and flagella. These are special motion organelles found in some cells of various organisms. Under a light microscope, these structures look like thin outgrowths of a cell. At the base of the cilia and flagella in the cytoplasm are visible small granules – basal bodies. The length of the cilia is 5-10 microns, and the length of the flagella can reach 150 microns. Cilia and flagella are thin outgrowths of the cytoplasm, covered from the base to the very top with a plasma membrane. Microtubules are located inside the cytoplasm outgrowth in a circle – 9 pairs (doublets). Doublets are linked to each other by protein molecules. In addition to the peripheral doublets of microtubules forming a cylinder, a pair of central microtubules is located in the center of the cilia. At the base of the organelles of movement, in the cytoplasm, are the basal bodies – one in the cilia and two in the flagella. The basal body is very similar in structure to centriole. It also consists of 9 microtubule triplets. Cilia and flagella are structurally connected with the basal body and together form a single whole. Flagella characteristic of a number of protozoa (class Flagellates), zoospores and sperm. Cilia are organoids of the movement of ciliates, free-floating larvae of many marine animals and male gametes of some ferns. They have cilia and ciliated epithelial cells in multicellular animals (up to 500 cilia per cell).

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.