What 3 places in the human body flagellates may be found?

Flagellates can be found in various parts of the human body, primarily in the gastrointestinal tract, where organisms like Giardia lamblia reside, causing intestinal infections. They can also be present in the urogenital tract, such as Trichomonas vaginalis, which is associated with sexually transmitted infections. Additionally, flagellates may be found in the bloodstream, as seen with Trypanosoma species, which are responsible for diseases like sleeping sickness and Chagas disease.