5.5 Stentor Shows the slow deliberate movement of this ciliate, as well as the internal structure including the string of nuclei. The organelles of this flagellated alga are clear, such as the red eyespot, the chloroplasts, and the flagella. Unrestricted, Euglena moves in a rotating motion using its flagella. When restricted between slide and coverslip, the pellicle gives and the Euglena can flex using its internal contractile machinery. Shows smaller organisms being moved by the cilia.
Some nematodes are parasitic, but most are free-living and found in soil and aquatic habitats.