section_path: Structures outside the cell membrane/Prokaryotic/Flagella
section_name: Flagella
paragraph_text: Flagella
  
  Flagella are organelles for cellular mobility. The bacterial flagellum stretches from cytoplasm through the cell membrane(s) and extrudes through the cell wall. They are long and thick thread-like appendages, protein in nature. A different type of flagellum is found in archaea and a different type is found in eukaryotes.