Paramecia are single-celled protists that are naturally found in aquatic habitats. They are typically oblong or slipper-shaped and are covered with short hairy structures called cilia. Certain paramecia are also easily cultured in labs and serve as useful model organisms.

Paramecium is a unicellular organism with a shape resembling the sole of a shoe. It is a single-celled eukaryote belonging to kingdom Protista and is a well-known genus of ciliate protozoa. As well, it belongs to the phylum Ciliophora.

Paramecium are ciliated, unicellular, multi-nucleated organisms that reproduce both asexually and sexually, depending upon environmental conditions.

Paramecium was chosen because it is a model ciliate for morphological, ecological, and genetic research [33] .

( A ) Life cycle. Left , vegetative cycle. During vegetative growth, paramecia divide by binary fission. The two micronuclei (MIC) undergo mitosis in the absence of nuclear envelope breakdown, while the macronucleus (MAC) elongates and divides by an amitotic process.

Paramecia have two kinds of nuclei: a large ellipsoidal nucleus called a macronucleus and at least one small nucleus called a micronucleus. Both types of nuclei contain the full complement of genes that bear the hereditary information of the organism. Paramecium also exhibits several types of sexual processes.

Most Euglena have a life cycle consisting of a free-swimming stage and a non-motile stage. In the free-swimming stage, Euglena reproduce rapidly by a type of asexual reproduction method known as binary fission.

Euglena are not plant cells even though they contain chloroplasts. Euglena have an eyespot which is used to detect . This helps it find sunlight to move towards and therefore make food in their by photosynthesis. Like bacteria, fungi are a type of microbe.

In the center of the cell is the nucleus, which contains the cell’s DNA and controls the cell’s activities. The nucleolus can be seen within the nucleus. Color the nucleus purple, and the nucleolus pink. The interior of the cell contains a jelly-like fluid substance called cytoplasm.

Class Trypanistomatida contains two infectious genera: Leishmania and Trypanosoma, and these two genera account for three of the most debilitating, widespread, and prevalent diseases of humans: leishmaniasis, Chagas disease, and sleeping sickness.

ciliates

In the green one-celled organism Euglena, the eyespot is located in the gullet, at the base of the flagellum (a whiplike locomotory structure). A cup-shaped mass of pigment rods shields a sensitive area of the flagellar base from light coming from the direction of the opposite end of the organism.

Euglena do photosynthesis using the same basic process that plants use. They also move around and eat, as do animals. But you are right that they are not classified as either of these. There’s no cell wall around a Euglena’s cell membrane, so it is a protozoan.

Protozoan infections are responsible for diseases that affect many different types of organisms, including plants, animals, and some marine life. Many of the most prevalent and deadly human diseases are caused by a protozoan infection, including African Sleeping Sickness, amoebic dysentery, and malaria.

Protozoa (pro-toe-ZO-uh) are one-celled organisms, like bacteria. But they are bigger than bacteria and contain a nucleus and other cell structures, making them more like plant and animal cells. Protozoa love moisture.

Most parasitic protozoa in humans are less than 50 μm in size. The smallest (mainly intracellular forms) are 1 to 10 μm long, but Balantidium coli may measure 150 μm. Protozoa are unicellular eukaryotes.